Thieno- and furo-pyrimidine modulators of the histamine h4 receptor

ABSTRACT

Thieno- and furo-pyrimidine compounds are described, which are useful as H 4  receptor modulators. Such compounds may be used in pharmaceutical compositions and methods for the modulation of histamine H 4  receptor activity and for the treatment of disease states, disorders, and conditions mediated by H 4  receptor activity, such as inflammation.

This application is a divisional of U.S. patent application Ser. No.12/283,700 filed Sep. 12, 2008, which claims the benefit of U.S.provisional patent application Ser. No. 60/972,589, filed on Sep. 14,2007, all of which are incorporated herein by reference.

FIELD OF THE INVENTION

The present invention relates to certain thieno- and furo-pyrimidinecompounds, pharmaceutical compositions containing them, and methods ofusing them for the modulation of the histamine H₄ receptor and for thetreatment of disease states, disorders, and conditions mediated byhistamine H₄ receptor activity.

BACKGROUND OF THE INVENTION

The histamine H₄ receptor (H₄R) is the most recently identified receptorfor histamine (for reviews, see: Fung-Leung, W.-P., et al., Curr. Opin.Invest. Drugs 2004, 5(11), 1174-1183; de Esch, I. J. P., et al., TrendsPharmacol. Sci. 2005, 26(9), 462-469). The receptor is found in the bonemarrow and spleen and is expressed on eosinophils, basophils, mast cells(Liu, C., et al., Mol. Pharmacol. 2001, 59(3), 420-426; Liu, C., et al.,J. Pharmacology and Experimental Therapeutics 2001, 299, 121-130; Morse,K. L., et al., J. Pharmacol. Exp. Ther. 2001, 296(3), 1058-1066;Hofstra, C. L., et al., J. Pharmacol. Exp. Ther. 2003, 305(3),1212-1221; Lippert, U., et al., J. Invest. Dermatol. 2004, 123(1),116-123; Voehringer, D., et al., Immunity 2004, 20(3), 267-277), CD8⁺ Tcells (Gantner, F., et al., J. Pharmacol. Exp. Ther. 2002, 303(1),300-307), dendritic cells, and human synovial cells from rheumatoidarthritis patients (Ikawa, Y., et al., Biol. Pharm. Bull. 2005, 28(10),2016-2018). However, expression in neutrophils and monocytes is lesswell defined (Ling, P., et al., Br. J. Pharmacol. 2004, 142(1),161-171). Receptor expression is at least in part controlled by variousinflammatory stimuli (Coge, F., et al., Biochem. Biophys. Res. Commun.2001, 284(2), 301-309; Morse, et al., 2001), thus supporting that H₄receptor activation influences inflammatory responses. Because of itspreferential expression on immunocompetent cells, the H₄ receptor isclosely related with the regulatory functions of histamine during theimmune response.

A biological activity of histamine in the context of immunology andautoimmune diseases is closely related with the allergic response andits deleterious effects, such as inflammation. Events that elicit theinflammatory response include physical stimulation (including trauma),chemical stimulation, infection, and invasion by a foreign body. Theinflammatory response is characterized by pain, increased temperature,redness, swelling, reduced function, or a combination of these.

Mast cell degranulation (exocytosis) releases histamine and leads to aninflammatory response that may be initially characterized by ahistamine-modulated wheal and flare reaction. A wide variety ofimmunological stimuli (e.g., allergens or antibodies) andnon-immunological (e.g., chemical) stimuli may cause the activation,recruitment, and de-granulation of mast cells. Mast cell activationinitiates allergic inflammatory responses, which in turn cause therecruitment of other effector cells that further contribute to theinflammatory response. It has been shown that histamine induceschemotaxis of mouse mast cells (Hofstra, et al., 2003). Chemotaxis doesnot occur using mast cells derived from H₄ receptor knockout mice.Furthermore, the response is blocked by an H₄-specific antagonist, butnot by H₁, H₂ or H₃ receptor antagonists (Hofstra, et al., 2003;Thurmond, R. L., et al., J. Pharmacol. Exp. Ther. 2004, 309(1),404-413). The in vivo migration of mast cells to histamine has also beeninvestigated and shown to be H₄ receptor dependent (Thurmond, et al.,2004). The migration of mast cells may play a role in allergic rhinitisand allergy where increases in mast cell number are found (Kirby, J. G.,et al., Am. Rev. Respir. Dis. 1987, 136(2), 379-383; Crimi, E., et al.,Am. Rev. Respir. Dis. 1991, 144(6), 1282-1286; Amin, K., et al., Am. J.Resp. Crit. Care Med. 2000, 162(6), 2295-2301; Gauvreau, G. M., et al.,Am. J. Resp. Crit. Care Med. 2000, 161(5), 1473-1478; Kassel, O., etal., Clin. Exp. Allergy 2001, 31(9), 1432-1440). In addition, it isknown that in response to allergens there is a redistribution of mastcells to the epithelial lining of the nasal mucosa (Fokkens, W. J., etal., Clin. Exp. Allergy 1992, 22(7), 701-710; Slater, A., et al., J.Laryngol. Otol. 1996, 110, 929-933). These results show that thechemotactic response of mast cells is mediated by histamine H₄receptors.

It has been shown that eosinophils can chemotax towards histamine(O'Reilly, M., et al., J. Recept. Signal Transduction 2002, 22(1-4),431-448; Buckland, K. F., et al., Br. J. Pharmacol. 2003, 140(6),1117-1127; Ling et al., 2004). Using H₄ selective ligands, it has beenshown that histamine-induced chemotaxis of eosinophils is mediatedthrough the H₄ receptor (Buckland, et al., 2003; Ling et al., 2004).Cell surface expression of adhesion molecules CD11b/CD18 (LFA-1) andCD54 (ICAM-1) on eosinophils increases after histamine treatment (Ling,et al., 2004). This increase is blocked by H₄ receptor antagonists butnot by H₁, H₂, or H₃ receptor antagonists.

The H₄R also plays a role in dendritic cells and T cells. In humanmonocyte-derived dendritic cells, H₄R stimulation suppresses IL-12p70production and drives histamine-mediated chemotaxis (Gutzmer, R., etal., J. Immunol. 2005, 174(9), 5224-5232). A role for the H₄ receptor inCD8⁺ T cells has also been reported. Gantner, et al., (2002) showed thatboth H₄ and H₂ receptors control histamine-induced IL-16 release fromhuman CD8⁺ T cells. IL-16 is found in the bronchoalveolar fluid ofallergen- or histamine-challenged asthmatics (Mashikian, V. M., et al.,J. Allergy Clin. Immunol. 1998, 101 (6, Part 1), 786-792; Krug, N., etal., Am. J. Resp. Grit. Care Med. 2000, 162(1), 105-111) and isconsidered important in CD4⁺ cell migration. The activity of thereceptor in these cell types indicates an important role in adaptiveimmune responses such as those active in autoimmune diseases.

In vivo H₄ receptor antagonists were able to block neutrophillia inzymosan-induced peritonitis or pleurisy models (Takeshita, K., et al.,J. Pharmacol. Exp. Ther. 2003, 307(3), 1072-1078; Thurmond, et al.,2004). In addition, H₄ receptor antagonists have activity in a widelyused and well-characterized model of colitis (Varga, C., et al., Eur. J.Pharmacol. 2005, 522(1-3), 130-138). These results support theconclusion that H₄ receptor antagonists have the capacity to beanti-inflammatory in vivo.

Another physiological role of histamine is as a mediator of itch and H₁receptor antagonists are not completely effective in the clinic.Recently, the H₄ receptor has also been implicated in histamine-inducedscratching in mice (Bell, J. K., et al., Br. J. Pharmacol. 2004, 142(2),374-380). The effects of histamine could be blocked by H₄ antagonists.These results support the hypothesis that the H₄ receptor is involved inhistamine-induced itch and that H₄ receptor antagonists will thereforehave positive effects in treating pruritis.

Modulation of H₄ receptors controls the release of inflammatorymediators and inhibits leukocyte recruitment, thus providing the abilityto prevent and/or treat H₄-mediated diseases and conditions, includingthe deleterious effects of allergic responses such as inflammation.Compounds according to the present invention have H₄ receptor modulatingproperties. Compounds according to the present invention have leukocyterecruitment inhibiting properties. Compounds according to the presentinvention have anti-inflammatory properties.

Examples of textbooks on the subject of inflammation include: 1) Gallin,J. I.; Snyderman, R., Inflammation: Basic Principles and ClinicalCorrelates, 3rd ed.; Lippincott Williams & Wilkins: Philadelphia, 1999;2) Stvrtinova, V., et al., Inflammation and Fever. PathophysiologyPrinciples of Diseases (Textbook for Medical Students); Academic Press:New York, 1995; 3) Cecil; et al. Textbook Of Medicine, 18th ed.; W.B.Saunders Co., 1988; and 4) Stedman's Medical Dictionary.

Background and review material on inflammation and conditions relatedwith inflammation can be found in articles such as the following:Nathan, C., Nature 2002, 420(6917), 846-852; Tracey, K. J., Nature 2002,420(6917), 853-859; Coussens, L. M., et al., Nature 2002, 420(6917),860-867; Libby, P., Nature 2002, 420, 868-874; Benoist, C., et al.,Nature 2002, 420(6917), 875-878; Weiner, H. L., et al., Nature 2002,420(6917), 879-884; Cohen, J., Nature 2002, 420(6917), 885-891;Steinberg, D., Nature Med. 2002, 8(11), 1211-1217.

Small-molecule histamine H₄ receptor modulators according to thisinvention control the release of inflammatory mediators and inhibitleukocyte recruitment, and may be useful in treating inflammation ofvarious etiologies, including the following conditions and diseases:inflammatory disorders, allergic disorders, dermatological disorders,autoimmune disease, lymphatic disorders, pruritis, and immunodeficiencydisorders. Diseases, disorders and medical conditions that are mediatedby histamine H₄ receptor activity include those referred to herein.

Certain cyclic amine-substituted 2-aminopyrimidines are disclosed in thefollowing publications: Becker, I. J. Het. Chem. 2005, 42(7), 1289-1295;Eur. Pat. Appl. No. EP 1437348 (Jul. 14, 2004); U.S. Pat. No. 3,907,801(Sep. 23, 1975); Lespagnol, A. et al. Chim. Therap. 1971, 6(2), 105-108;Willecomme, B. Annales de Chimie 1969, 4(6), 405-428; Lespagnol, A. etal. Chim. Therap. 1965, 1, 26-31; US 2006/281768; and US 2005/153989.

Certain substituted 2-aminopyrimidines as histamine H₄ antagonists aredisclosed in Intl. Pat. Appl. Publ. WO2005/054239 (Jun. 16, 2005) and EP1505064 (Feb. 9, 2005). However, there remains a need for potenthistamine H₄ receptor modulators with desirable pharmaceuticalproperties. Certain 2-aminopyrimidine derivatives have been found in thecontext of this invention to have histamine H₄ receptor-modulatingactivity.

SUMMARY OF THE INVENTION

In one aspect the invention relates to chemical entity selected from thegroup consisting of compounds of the following Formula (I),pharmaceutically acceptable salts of compounds of Formula (I),pharmaceutically acceptable prodrugs of compounds of Formula (I), andpharmaceutically active metabolites of compounds of Formula (I):

wherein

-   X is O or S;-   R¹ is H, methyl, or bromo;-   R² is H or C₁₋₄alkyl;-   or R¹ and R² taken together form —(CH₂)₄₋₅— optionally substituted    with one or two substituents independently selected from C₁₋₄alkyl,    C₁₋₄alkoxy, CF₃, and fluoro; —N(R³)R⁴ is one of the following    moieties, wherein R³ and R⁴ are taken together or separately as    defined by each one of said moieties:

-   -   where q is 0 or 1;    -   p is 0 or 1;    -   r is 0 or 1;    -   R^(a) is H or OH;    -   R^(b) and R^(c) are each independently H or C₁₋₃alkyl;    -   R^(d) is H or a C₁₋₃alkyl group unsubstituted or substituted        with OH or NH₂;    -   R^(e) and R^(f) are each methyl, or R^(e) and R^(f) taken        together form a methylene or ethylene bridge; and

-   R⁵ is H or NH₂;

-   provided that when R¹ is H and R² is H, methyl, or tert-butyl, then    —N(R³)R⁴ is not 3-aminopyrrolidine, 3-aminopiperidine, piperazine,    or N-methylpiperazine.

Some embodiments of this invention are provided by chemical entitiessuch as compounds selected from those species described or exemplifiedin the detailed description below, pharmaceutically acceptable salts ofsuch compounds, pharmaceutically acceptable prodrugs of such compounds,and pharmaceutically acceptable metabolites of such compounds.

In a further aspect, the invention relates to pharmaceuticalcompositions each comprising an effective amount of at least onechemical entity selected from compounds of Formula (I), pharmaceuticallyacceptable salts of compounds of Formula (I), pharmaceuticallyacceptable prodrugs of compounds of Formula (I), and pharmaceuticallyactive metabolites of compounds of Formula (I). Pharmaceuticalcompositions according to the invention may further comprise apharmaceutically acceptable excipient.

In another aspect, the chemical entities of the present invention areuseful as histamine H₄ receptor modulators. Thus, the invention isdirected to a method for modulating histamine H₄ receptor activity,including when such receptor is in a subject, comprising exposinghistamine H₄ receptor to an effective amount of at least one chemicalentity selected from compounds of Formula (I), pharmaceuticallyacceptable salts of compounds of Formula (I), pharmaceuticallyacceptable prodrugs of compounds of Formula (I), and pharmaceuticallyactive metabolites of compounds of Formula (I).

In another aspect, the invention is directed to a method of treating asubject suffering from or diagnosed with a disease, disorder, or medicalcondition mediated by histamine H₄ receptor activity, comprisingadministering to the subject in need of such treatment an effectiveamount of at least one chemical entity selected from compounds ofFormula (I), pharmaceutically acceptable salts of compounds of Formula(I), pharmaceutically acceptable prodrugs of compounds of Formula (I),and pharmaceutically active metabolites of compounds of Formula (I).

In certain preferred embodiments of the inventive method, the disease,disorder, or medical condition is inflammation. Inflammation hereinrefers to the response that develops as a consequence of histaminerelease, which in turn is caused by at least one stimulus. Examples ofsuch stimuli are immunological stimuli and non-immunological stimuli.

An object of the present invention is to overcome or ameliorate at leastone of the disadvantages of the conventional methodologies and/or priorart, or to provide a useful alternative thereto.

Additional embodiments, features, and advantages of the invention willbe apparent from the following detailed description and through practiceof the invention.

DETAILED DESCRIPTION OF INVENTION AND ITS PREFERRED EMBODIMENTS

For the sake of brevity, the disclosures of the publications, includingpatents, cited in this specification are herein incorporated byreference.

As used herein, the terms “including”, “containing” and “comprising” areused herein in their open, non-limiting sense.

The term “alkyl” refers to a straight- or branched-chain alkyl grouphaving from 1 to 12 carbon atoms in the chain. Examples of alkyl groupsinclude methyl (Me, which also may be structurally depicted by a “/”symbol), ethyl (Et), n-propyl, isopropyl, butyl, isobutyl, sec-butyl,tert-butyl (tBu), pentyl, isopentyl, tert-pentyl, hexyl, isohexyl, andgroups that in light of the ordinary skill in the art and the teachingsprovided herein would be considered equivalent to any one of theforegoing examples.

The term “cycloalkyl” refers to a saturated or partially saturated,monocyclic, fused polycyclic, or spiro polycyclic carbocycle having from3 to 12 ring atoms per carbocycle. Illustrative examples of cycloalkylgroups include the following entities, in the form of properly bondedmoieties:

A “heterocycloalkyl” refers to a monocyclic, or fused, bridged, or spiropolycyclic ring structure that is saturated or partially saturated andhas from 3 to 12 ring atoms per ring structure selected from carbonatoms and up to three heteroatoms selected from nitrogen, oxygen, andsulfur. The ring structure may optionally contain up to two oxo groupson carbon or sulfur ring members. Illustrative entities, in the form ofproperly bonded moieties, include:

The term “heteroaryl” refers to a monocyclic, fused bicyclic, or fusedpolycyclic aromatic heterocycle (ring structure having ring atomsselected from carbon atoms and up to four heteroatoms selected fromnitrogen, oxygen, and sulfur) having from 3 to 12 ring atoms perheterocycle. Illustrative examples of heteroaryl groups include thefollowing entities, in the form of properly bonded moieties:

Those skilled in the art will recognize that the species of heteroaryl,cycloalkyl, and heterocycloalkyl groups listed or illustrated above arenot exhaustive, and that additional species within the scope of thesedefined terms may also be selected.

The term “halogen” represents chlorine, fluorine, bromine, or iodine.The term “halo” represents chloro, fluoro, bromo, or iodo.

The term “substituted” means that the specified group or moiety bearsone or more substituents. The term “unsubstituted” means that thespecified group bears no substituents. The term “optionally substituted”means that the specified group is unsubstituted or substituted by one ormore substituents. Where the term “substituted” is used to describe astructural system, the substitution is meant to occur at anyvalency-allowed position on the system.

Any formula given herein is intended to represent compounds havingstructures depicted by the structural formula as well as certainvariations or forms. In particular, compounds of any formula givenherein may have asymmetric centers and therefore exist in differentenantiomeric forms. All optical isomers and stereoisomers of thecompounds of the general formula, and mixtures thereof, are consideredwithin the scope of the formula. Thus, any formula given herein isintended to represent a racemate, one or more enantiomeric forms, one ormore diastereomeric forms, one or more atropisomeric forms, and mixturesthereof. Furthermore, certain structures may exist as geometric isomers(i.e., cis and trans isomers), as tautomers, or as atropisomers.Additionally, any formula given herein is intended to representhydrates, solvates, and polymorphs of such compounds, and mixturesthereof.

To provide a more concise description, some of the quantitativeexpressions given herein are not qualified with the term “about”. It isunderstood that, whether the term “about” is used explicitly or not,every quantity given herein is meant to refer to the actual given value,and it is also meant to refer to the approximation to such given valuethat would reasonably be inferred based on the ordinary skill in theart, including equivalents and approximations due to the experimentaland/or measurement conditions for such given value. Whenever a yield isgiven as a percentage, such yield refers to a mass of the entity forwhich the yield is given with respect to the maximum amount of the sameentity that could be obtained under the particular stoichiometricconditions. Concentrations that are given as percentages refer to massratios, unless indicated differently.

Reference to a chemical entity herein stands for a reference to any oneof: (a) the actually recited form of such chemical entity, and (b) anyof the forms of such chemical entity in the medium in which the compoundis being considered when named. For example, reference herein to acompound such as R—COOH, encompasses reference to any one of, forexample, R—COOH_((s)), R—COOH_((sol)), and R—COO⁻ _((sol)). In thisexample, R—COOH_((s)) refers to the solid compound, as it could be forexample in a tablet or some other solid pharmaceutical composition orpreparation; R—COOH_((sol)) refers to the undissociated form of thecompound in a solvent; and R—COO⁻ _((sol)) refers to the dissociatedform of the compound in a solvent, such as the dissociated form of thecompound in an aqueous environment, whether such dissociated formderives from R—COOH, from a salt thereof, or from any other entity thatyields R—COO⁻ upon dissociation in the medium being considered. Inanother example, an expression such as “exposing an entity to compoundof formula R—COOH” refers to the exposure of such entity to the form, orforms, of the compound R—COOH that exists, or exist, in the medium inwhich such exposure takes place. In still another example, an expressionsuch as “reacting an entity with a compound of formula R—COOH” refers tothe reacting of (a) such entity in the chemically relevant form, orforms, of such entity that exists, or exist, in the medium in which suchreacting takes place, with (b) the chemically relevant form, or forms,of the compound R—COOH that exists, or exist, in the medium in whichsuch reacting takes place. In this regard, if such entity is for examplein an aqueous environment, it is understood that the compound R—COOH isin such same medium, and therefore the entity is being exposed tospecies such as R—COOH_((aq)) and/or R—COO⁻ _((aq)), where the subscript“(aq)” stands for “aqueous” according to its conventional meaning inchemistry and biochemistry. A carboxylic acid functional group has beenchosen in these nomenclature examples; this choice is not intended,however, as a limitation but it is merely an illustration. It isunderstood that analogous examples can be provided in terms of otherfunctional groups, including but not limited to hydroxyl, basic nitrogenmembers, such as those in amines, and any other group that interacts ortransforms according to known manners in the medium that contains thecompound. Such interactions and transformations include, but are notlimited to, dissociation, association, tautomerism, solvolysis,including hydrolysis, solvation, including hydration, protonation, anddeprotonation. No further examples in this regard are provided hereinbecause these interactions and transformations in a given medium areknown by any one of ordinary skill in the art.

Any formula given herein is also intended to represent unlabeled formsas well as isotopically labeled forms of the compounds. Isotopicallylabeled compounds have structures depicted by the formulas given hereinexcept that one or more atoms are replaced by an atom having a selectedatomic mass or mass number. Examples of isotopes that can beincorporated into compounds of the invention include isotopes ofhydrogen, carbon, nitrogen, oxygen, phosphorous, fluorine, chlorine, andiodine, such as ²H, ³H, ¹¹C, ¹³C, ¹⁴C, ¹⁵N, ¹⁸O, ¹⁷O, ³¹P, ³²P, ³⁵S,¹⁸F, ³⁶Cl, ¹²⁵I, respectively. Such isotopically labelled compounds areuseful in metabolic studies (preferably with ¹⁴C), reaction kineticstudies (with, for example ²H or ³H), detection or imaging techniques[such as positron emission tomography (PET) or single-photon emissioncomputed tomography (SPECT)] including drug or substrate tissuedistribution assays, or in radioactive treatment of patients. Inparticular, an ¹⁸F or ¹¹C labeled compound may be particularly preferredfor PET or SPECT studies. Further, substitution with heavier isotopessuch as deuterium (i.e., ²H) may afford certain therapeutic advantagesresulting from greater metabolic stability, for example increased invivo half-life or reduced dosage requirements. Isotopically labeledcompounds of this invention and prodrugs thereof can generally beprepared by carrying out the procedures disclosed in the schemes or inthe examples and preparations described below by substituting a readilyavailable isotopically labeled reagent for a non-isotopically labeledreagent.

When referring to any formula given herein, the selection of aparticular moiety from a list of possible species for a specifiedvariable is not intended to define the same choice of the species forthe variable appearing elsewhere. In other words, where a variableappears more than once, the choice of the species from a specified listis independent of the choice of the species for the same variableelsewhere in the formula, unless stated otherwise.

By way of a first example on substituent terminology, if substituent S¹_(example) is one of S₁ and S₂, and substituent S² _(example) is one ofS₃ and S₄, then these assignments refer to embodiments of this inventiongiven according to the choices S¹ _(example) is S₁ and S² _(example) isS₃; S_(example) is S₁ and S² _(example) is S₄; S_(example) is S₂ and S²_(example) is S₃; S_(example) is S₂ and S² _(example) is S₄; andequivalents of each one of such choices. The shorter terminology “S¹_(example) is one of S₁ and S₂, and S² _(example) is one of S₃ and S₄”is accordingly used herein for the sake of brevity, but not by way oflimitation. The foregoing first example on substituent terminology,which is stated in generic terms, is meant to illustrate the varioussubstituent assignments described herein. The foregoing convention givenherein for substituents extends, when applicable, to members such as X,R¹⁻⁵, R^(a-e), and q, and any other generic substituent symbol usedherein.

Furthermore, when more than one assignment is given for any member orsubstituent, embodiments of this invention comprise the variousgroupings that can be made from the listed assignments, takenindependently, and equivalents thereof. By way of a second example onsubstituent terminology, if it is herein described that substituentS_(example) is one of S₁, S₂, and S₃, this listing refers to embodimentsof this invention for which S_(example) is S₁; S_(example) is S₂;S_(example) is S₃; S_(example) is one of S₁ and S₂; S_(example) is oneof S₁ and S₃; S_(example) is one of S₂ and S₃; S_(example) is one of S₁,S₂ and S₃; and S_(example) is any equivalent of each one of thesechoices. The shorter terminology “S_(example) is one of S₁, S₂, and S₃”is accordingly used herein for the sake of brevity, but not by way oflimitation. The foregoing second example on substituent terminology,which is stated in generic terms, is meant to illustrate the varioussubstituent assignments described herein. The foregoing convention givenherein for substituents extends, when applicable, to members such as X,R¹⁻⁵, R^(a-e), and q, and any other generic substituent symbol usedherein.

The nomenclature “C_(i-j)” with j>i, when applied herein to a class ofsubstituents, is meant to refer to embodiments of this invention forwhich each and every one of the number of carbon members, from i to jincluding i and j, is independently realized. By way of example, theterm C₁₋₃ refers independently to embodiments that have one carbonmember (C₁), embodiments that have two carbon members (C₂), andembodiments that have three carbon members (C₃).

The term C_(n-m)alkyl refers to an aliphatic chain, whether straight orbranched, with a total number N of carbon members in the chain thatsatisfies n≦N≦m, with m>n.

Any disubstituent referred to herein is meant to encompass the variousattachment possibilities when more than one of such possibilities areallowed. For example, reference to disubstituent -A-B-, where A≠B,refers herein to such disubstituent with A attached to a firstsubstituted member and B attached to a second substituted member, and italso refers to such disubstituent with A attached to the secondsubstituted member and B attached to the first substituted member.

According to the foregoing interpretive considerations on assignmentsand nomenclature, it is understood that explicit reference herein to aset implies, where chemically meaningful and unless indicated otherwise,independent reference to embodiments of such set, and reference to eachand every one of the possible embodiments of subsets of the set referredto explicitly.

In some embodiments of Formula (I), X is O.

In some embodiments, R¹ is H.

In some embodiments, R² is H or tert-butyl.

In some embodiments, R¹ and R² taken together form —(CH₂)₄— optionallysubstituted with a methyl, dimethyl, tert butyl, CF₃ or two fluorosubstituents.

In some embodiments, —N(R³)R⁴ is one of the following moieties:

-   where q is 0;-   R^(a) is H;-   R^(b) and R^(c) are each independently H or methyl; and-   R^(d) is H or methyl.

In other embodiments, —N(R³)R⁴ is one of the following moieties:

-   where q is 0;-   R^(a) is H;-   R^(b) and R^(c) are each independently H or methyl; and-   R^(d) is H or methyl.

In some embodiments, R⁵ is NH₂.

The invention includes also pharmaceutically acceptable salts of thecompounds represented by Formula (I), preferably of those describedabove and of the specific compounds exemplified herein, and methodsusing such salts.

A “pharmaceutically acceptable salt” is intended to mean a salt of afree acid or base of a compound represented by Formula (I) that isnon-toxic, biologically tolerable, or otherwise biologically suitablefor administration to the subject. See, generally, S. M. Berge, et al.,“Pharmaceutical Salts”, J. Pharm. Sci., 1977, 66:1-19, and Handbook ofPharmaceutical Salts, Properties, Selection, and Use, Stahl and Wermuth,Eds., Wiley-VCH and VHCA, Zurich, 2002. Preferred pharmaceuticallyacceptable salts are those that are pharmacologically effective andsuitable for contact with the tissues of patients without unduetoxicity, irritation, or allergic response. A compound of Formula (I)may possess a sufficiently acidic group, a sufficiently basic group, orboth types of functional groups, and accordingly react with a number ofinorganic or organic bases, and inorganic and organic acids, to form apharmaceutically acceptable salt. Examples of pharmaceuticallyacceptable salts include sulfates, pyrosulfates, bisulfates, sulfites,bisulfites, phosphates, monohydrogen-phosphates, dihydrogenphosphates,metaphosphates, pyrophosphates, chlorides, bromides, iodides, acetates,propionates, decanoates, caprylates, acrylates, formates, isobutyrates,caproates, heptanoates, propiolates, oxalates, malonates, succinates,suberates, sebacates, fumarates, maleates, butyne-1,4-dioates,hexyne-1,6-dioates, benzoates, chlorobenzoates, methyl benzoates,dinitrobenzoates, hydroxybenzoates, methoxybenzoates, phthalates,sulfonates, xylenesulfonates, phenylacetates, phenylpropionates,phenylbutyrates, citrates, lactates, γ-hydroxybutyrates, glycolates,tartrates, methane-sulfonates, propanesulfonates,naphthalene-1-sulfonates, naphthalene-2-sulfonates, and mandelates.

If the compound of Formula (I) contains a basic nitrogen, the desiredpharmaceutically acceptable salt may be prepared by any suitable methodavailable in the art, for example, treatment of the free base with aninorganic acid, such as hydrochloric acid, hydrobromic acid, sulfuricacid, sulfamic acid, nitric acid, boric acid, phosphoric acid, and thelike, or with an organic acid, such as acetic acid, phenylacetic acid,propionic acid, stearic acid, lactic acid, ascorbic acid, maleic acid,hydroxymaleic acid, isethionic acid, succinic acid, valeric acid,fumaric acid, malonic acid, pyruvic acid, oxalic acid, glycolic acid,salicylic acid, oleic acid, palmitic acid, lauric acid, a pyranosidylacid, such as glucuronic acid or galacturonic acid, an alpha-hydroxyacid, such as mandelic acid, citric acid, or tartaric acid, an aminoacid, such as aspartic acid or glutamic acid, an aromatic acid, such asbenzoic acid, 2-acetoxybenzoic acid, naphthoic acid, or cinnamic acid, asulfonic acid, such as laurylsulfonic acid, p-toluenesulfonic acid,methanesulfonic acid, ethanesulfonic acid, any compatible mixture ofacids such as those given as examples herein, and any other acid andmixture thereof that are regarded as equivalents or acceptablesubstitutes in light of the ordinary level of skill in this technology.

If the compound of Formula (I) is an acid, such as a carboxylic acid orsulfonic acid, the desired pharmaceutically acceptable salt may beprepared by any suitable method, for example, treatment of the free acidwith an inorganic or organic base, such as an amine (primary, secondaryor tertiary), an alkali metal hydroxide, alkaline earth metal hydroxide,any compatible mixture of bases such as those given as examples herein,and any other base and mixture thereof that are regarded as equivalentsor acceptable substitutes in light of the ordinary level of skill inthis technology. Illustrative examples of suitable salts include organicsalts derived from amino acids, such as glycine and arginine, ammonia,carbonates, bicarbonates, primary, secondary, and tertiary amines, andcyclic amines, such as benzylamines, pyrrolidines, piperidine,morpholine, and piperazine, and inorganic salts derived from sodium,calcium, potassium, magnesium, manganese, iron, copper, zinc, aluminum,and lithium.

The invention also relates to pharmaceutically acceptable prodrugs ofthe compounds of Formula (I), and methods employing suchpharmaceutically acceptable prodrugs. The term “prodrug” means aprecursor of a designated compound that, following administration to asubject, yields the compound in vivo via a chemical or physiologicalprocess such as solvolysis or enzymatic cleavage, or under physiologicalconditions (e.g., a prodrug on being brought to physiological pH isconverted to the compound of Formula (I)). A “pharmaceuticallyacceptable prodrug” is a prodrug that is non-toxic, biologicallytolerable, and otherwise biologically suitable for administration to thesubject. Illustrative procedures for the selection and preparation ofsuitable prodrug derivatives are described, for example, in “Design ofProdrugs”, ed. H. Bundgaard, Elsevier, 1985.

Examples of prodrugs include compounds having an amino acid residue, ora polypeptide chain of two or more (e.g., two, three or four) amino acidresidues, covalently joined through an amide or ester bond to a freeamino, hydroxy, or carboxylic acid group of a compound of Formula (I).Examples of amino acid residues include the twenty naturally occurringamino acids, commonly designated by three letter symbols, as well as4-hydroxyproline, hydroxylysine, demosine, isodemosine,3-methylhistidine, norvalin, beta-alanine, gamma-aminobutyric acid,citrulline homocysteine, homoserine, ornithine and methionine sulfone.

Additional types of prodrugs may be produced, for instance, byderivatizing free carboxyl groups of structures of Formula (I) as amidesor alkyl esters. Examples of amides include those derived from ammonia,primary C₁₋₆alkyl amines and secondary di(C₁₋₆alkyl) amines. Secondaryamines include 5- or 6-membered heterocycloalkyl or heteroaryl ringmoieties. Examples of amides include those that are derived fromammonia, C₁₋₃alkyl primary amines, and di(C₁₋₂alkyl)amines. Examples ofesters of the invention include C₁₋₇alkyl, C₅₋₇cycloalkyl, phenyl, andphenyl(C₁₋₆alkyl) esters. Preferred esters include methyl esters.Prodrugs may also be prepared by derivatizing free hydroxy groups usinggroups including hemisuccinates, phosphate esters,dimethylaminoacetates, and phosphoryloxymethyloxycarbonyls, followingprocedures such as those outlined in Adv. Drug Delivery Rev. 1996, 19,115. Carbamate derivatives of hydroxy and amino groups may also yieldprodrugs. Carbonate derivatives, sulfonate esters, and sulfate esters ofhydroxy groups may also provide prodrugs. Derivatization of hydroxygroups as (acyloxy)methyl and (acyloxy)ethyl ethers, wherein the acylgroup may be an alkyl ester, optionally substituted with one or moreether, amine, or carboxylic acid functionalities, or where the acylgroup is an amino acid ester as described above, is also useful to yieldprodrugs. Prodrugs of this type may be prepared as described in J. Med.Chem. 1996, 39, 10. Free amines can also be derivatized as amides,sulfonamides or phosphonamides. All of these prodrug moieties mayincorporate groups including ether, amine, and carboxylic acidfunctionalities.

The present invention also relates to pharmaceutically activemetabolites of compounds of Formula (I), and uses of such metabolites inthe methods of the invention. A “pharmaceutically active metabolite”means a pharmacologically active product of metabolism in the body of acompound of Formula (I) or salt thereof. Prodrugs and active metabolitesof a compound may be determined using routine techniques known oravailable in the art. See, e.g., Bertolini, et al., J. Med. Chem. 1997,40, 2011-2016; Shan, et al., J. Pharm. Sci. 1997, 86 (7), 765-767;Bagshawe, Drug Dev. Res. 1995, 34, 220-230; Bodor, Adv. Drug Res. 1984,13, 224-331; Bundgaard, Design of Prodrugs (Elsevier Press, 1985); andLarsen, Design and Application of Prodrugs, Drug Design and Development(Krogsgaard-Larsen, et al., eds., Harwood Academic Publishers, 1991).

The compounds of Formula (I) and their pharmaceutically acceptablesalts, pharmaceutically acceptable prodrugs, and pharmaceutically activemetabolites, whether alone or in combination, (collectively, “activeagents”) of the present invention are useful as histamine H₄ receptormodulators in the methods of the invention. Such methods for modulatinghistamine H₄ receptor activity comprise exposing histamine H₄ receptorto an effective amount of at least one chemical entity selected fromcompounds of Formula (I), pharmaceutically acceptable salts of compoundsof Formula (I), pharmaceutically acceptable prodrugs of compounds ofFormula (I), and pharmaceutically active metabolites of compounds ofFormula (I). Embodiments of this invention inhibit histamine H₄ receptoractivity.

In some embodiments, the histamine H₄ receptor is in a subject with adisease, disorder, or medical condition mediated through modulation ofthe histamine H₄ receptor, such as those described herein. Symptoms ordisease states are intended to be included within the scope of “medicalconditions, disorders, or diseases.”

Accordingly, the invention relates to methods of using the active agentsdescribed herein to treat subjects diagnosed with or suffering from adisease, disorder, or condition mediated through histamine H₄ receptoractivity, such as inflammation. Active agents according to the inventionmay therefore be used as an anti-inflammatory agents.

In some embodiments, an active agent of the present invention isadministered to treat inflammation. Inflammation may be associated withvarious diseases, disorders, or conditions, such as inflammatorydisorders, allergic disorders, dermatological disorders, autoimmunedisease, lymphatic disorders, and immunodeficiency disorders, includingthe more specific conditions and diseases given below. Regarding theonset and evolution of inflammation, inflammatory diseases orinflammation-mediated diseases or conditions include, but are notlimited to, acute inflammation, allergic inflammation, and chronicinflammation.

Illustrative types of inflammation treatable with a histamine H₄receptor-modulating agent according to the invention includeinflammation due to any one of a plurality of conditions such asallergy, asthma, dry eye, chronic obstructed pulmonary disease (COPD),atherosclerosis, rheumatoid arthritis, multiple sclerosis, inflammatorybowel diseases (including colitis, Crohn's disease, and ulcerativecolitis), psoriasis, pruritis, itchy skin, atopic dermatitis, urticaria(hives), ocular inflammation (e.g., post-surgical ocular inflammation),conjunctivitis, dry eye, nasal polyps, allergic rhinitis, nasal itch,scleroderma, autoimmune thyroid diseases, immune-mediated (also known astype 1) diabetes mellitus and lupus, which are characterized byexcessive or prolonged inflammation at some stage of the disease. Otherautoimmune diseases that lead to inflammation include Myasthenia gravis,autoimmune neuropathies, such as Guillain-Barré, autoimmune uveitis,autoimmune hemolytic anemia, pernicious anemia, autoimmunethrombocytopenia, temporal arteritis, anti-phospholipid syndrome,vasculitides, such as Wegener's granulomatosis, Behcet's disease,dermatitis herpetiformis, pemphigus vulgaris, vitiligio, primary biliarycirrhosis, autoimmune hepatitis, autoimmune oophoritis and orchitis,autoimmune disease of the adrenal gland, polymyositis, dermatomyositis,spondyloarthropathies, such as ankylosing spondylitis, and Sjogren'ssyndrome.

Pruritis treatable with a histamine H₄ receptor-modulating agentaccording to the invention includes that which is a symptom of allergiccutaneous diseases (such as atopic dermatitis and hives) and othermetabolic disorders (such as chronic renal failure, hepatic cholestasis,and diabetes mellitus).

In other embodiments, an active agent of the present invention isadministered to treat allergy, asthma, autoimmune diseases, or pruritis.

Thus, the active agents may be used to treat subjects diagnosed with orsuffering from a disease, disorder, or condition mediated throughhistamine H₄ receptor activity. The term “treat” or “treating” as usedherein is intended to refer to administration of an active agent orcomposition of the invention to a subject for the purpose of effecting atherapeutic or prophylactic benefit through modulation of histamine H₄receptor activity. Treating includes reversing, ameliorating,alleviating, inhibiting the progress of, lessening the severity of, orpreventing a disease, disorder, or condition, or one or more symptoms ofsuch disease, disorder or condition mediated through modulation ofhistamine H₄ receptor activity. The term “subject” refers to a mammalianpatient in need of such treatment, such as a human. “Modulators” includeboth inhibitors and activators, where “inhibitors” refer to compoundsthat decrease, prevent, inactivate, desensitize or down-regulatehistamine H₄ receptor expression or activity, and “activators” arecompounds that increase, activate, facilitate, sensitize, or up-regulatehistamine H₄ receptor expression or activity.

In treatment methods according to the invention, an effective amount ofat least one active agent according to the invention is administered toa subject suffering from or diagnosed as having such a disease,disorder, or condition. An “effective amount” means an amount or dosesufficient to generally bring about the desired therapeutic orprophylactic benefit in patients in need of such treatment for thedesignated disease, disorder, or condition. When referring to modulatingthe target receptor, an “effective amount” means an amount sufficient toaffect the activity of such receptor. Measuring the activity of thetarget receptor may be performed by routine analytical methods. Targetreceptor modulation is useful in a variety of settings, includingassays. Effective amounts or doses of the active agents of the presentinvention may be ascertained by routine methods such as modeling, doseescalation studies or clinical trials, and by taking into considerationroutine factors, e.g., the mode or route of administration or drugdelivery, the pharmacokinetics of the agent, the severity and course ofthe disease, disorder, or condition, the subject's previous or ongoingtherapy, the subject's health status and response to drugs, and thejudgment of the treating physician. An exemplary dose is in the range offrom about 0.001 to about 200 mg of active agent per kg of subject'sbody weight per day, preferably about 0.05 to 100 mg/kg/day, or about 1to 35 mg/kg/day, or about 0.1 to 10 mg/kg daily in single or divideddosage units (e.g., BID, TID, QID). For a 70-kg human, an illustrativerange for a suitable dosage amount is from about 0.05 to about 7 g/day,or about 0.2 to about 2.5 g/day.

Once improvement of the patient's disease, disorder, or condition hasoccurred, the dose may be adjusted for preventative or maintenancetreatment. For example, the dosage or the frequency of administration,or both, may be reduced as a function of the symptoms, to a level atwhich the desired therapeutic or prophylactic effect is maintained. Ofcourse, if symptoms have been alleviated to an appropriate level,treatment may cease. Patients may, however, require intermittenttreatment on a long-term basis upon any recurrence of symptoms.

In addition, the active agents of the invention may be used incombination with additional active ingredients in the treatment of theabove conditions. The additional active ingredients may becoadministered separately with an active agent of Formula (I) orincluded with such an agent in a pharmaceutical composition according tothe invention. In an exemplary embodiment, additional active ingredientsare those that are known or discovered to be effective in the treatmentof conditions, disorders, or diseases mediated by histamine H₄ receptoractivity, such as another histamine H₄ receptor modulator or a compoundactive against another target associated with the particular condition,disorder, or disease. The combination may serve to increase efficacy(e.g., by including in the combination a compound potentiating thepotency or effectiveness of an agent according to the invention),decrease one or more side effects, or decrease the required dose of theactive agent according to the invention.

The active agents of the invention are used, alone or in combinationwith one or more additional active ingredients, to formulatepharmaceutical compositions of the invention. A pharmaceuticalcomposition of the invention comprises an effective amount of at leastone active agent in accordance with the invention. Such compositions mayfurther comprise a pharmaceutically acceptable excipient.

A “pharmaceutically acceptable excipient” refers to a substance that isnon-toxic, biologically tolerable, and otherwise biologically suitablefor administration to a subject, such as an inert substance, added to apharmacological composition or otherwise used as a vehicle, carrier, ordiluent to facilitate administration of a agent and that is compatibletherewith. Examples of excipients include calcium carbonate, calciumphosphate, various sugars and types of starch, cellulose derivatives,gelatin, vegetable oils, and polyethylene glycols.

Delivery forms of the pharmaceutical compositions containing one or moredosage units of the active agents may be prepared using suitablepharmaceutical excipients and compounding techniques known or thatbecome available to those skilled in the art. The compositions may beadministered in the inventive methods by a suitable route of delivery,e.g., oral, parenteral, rectal, topical, or ocular routes, or byinhalation.

The preparation may be in the form of tablets, capsules, sachets,dragees, powders, granules, lozenges, powders for reconstitution, liquidpreparations, or suppositories. Preferably, the compositions areformulated for intravenous infusion, topical administration, or oraladministration.

For oral administration, the active agents of the invention can beprovided in the form of tablets or capsules, or as a solution, emulsion,or suspension. To prepare the oral compositions, the active agents maybe formulated to yield a dosage of, e.g., from about 0.05 to about 50mg/kg daily, or from about 0.05 to about 20 mg/kg daily, or from about0.1 to about 10 mg/kg daily.

Oral tablets may include the active ingredient(s) mixed with compatiblepharmaceutically acceptable excipients such as diluents, disintegratingagents, binding agents, lubricating agents, sweetening agents, flavoringagents, coloring agents and preservative agents. Suitable inert fillersinclude sodium and calcium carbonate, sodium and calcium phosphate,lactose, starch, sugar, glucose, methyl cellulose, magnesium stearate,mannitol, sorbitol, and the like. Exemplary liquid oral excipientsinclude ethanol, glycerol, water, and the like. Starch,polyvinyl-pyrrolidone (PVP), sodium starch glycolate, microcrystallinecellulose, and alginic acid are exemplary disintegrating agents. Bindingagents may include starch and gelatin. The lubricating agent, ifpresent, may be magnesium stearate, stearic acid or talc. If desired,the tablets may be coated with a material such as glyceryl monostearateor glyceryl distearate to delay absorption in the gastrointestinaltract, or may be coated with an enteric coating.

Capsules for oral administration include hard and soft gelatin capsules.To prepare hard gelatin capsules, active ingredient(s) may be mixed witha solid, semi-solid, or liquid diluent. Soft gelatin capsules may beprepared by mixing the active ingredient with water, an oil such aspeanut oil or olive oil, liquid paraffin, a mixture of mono anddi-glycerides of short chain fatty acids, polyethylene glycol 400, orpropylene glycol.

Liquids for oral administration may be in the form of suspensions,solutions, emulsions or syrups or may be lyophilized or presented as adry product for reconstitution with water or other suitable vehiclebefore use. Such liquid compositions may optionally contain:pharmaceutically-acceptable excipients such as suspending agents (forexample, sorbitol, methyl cellulose, sodium alginate, gelatin,hydroxyethylcellulose, carboxymethylcellulose, aluminum stearate gel andthe like); non-aqueous vehicles, e.g., oil (for example, almond oil orfractionated coconut oil), propylene glycol, ethyl alcohol, or water;preservatives (for example, methyl or propyl p-hydroxybenzoate or sorbicacid); wetting agents such as lecithin; and, if desired, flavoring orcoloring agents.

The active agents of this invention may also be administered by non-oralroutes. For example, compositions may be formulated for rectaladministration as a suppository. For parenteral use, includingintravenous, intramuscular, intraperitoneal, or subcutaneous routes, theagents of the invention may be provided in sterile aqueous solutions orsuspensions, buffered to an appropriate pH and isotonicity or inparenterally acceptable oil. Suitable aqueous vehicles include Ringer'ssolution and isotonic sodium chloride. Such forms may be presented inunit-dose form such as ampules or disposable injection devices, inmulti-dose forms such as vials from which the appropriate dose may bewithdrawn, or in a solid form or pre-concentrate that can be used toprepare an injectable formulation. Illustrative infusion doses rangefrom about 1 to 1000 μg/kg/minute of agent admixed with a pharmaceuticalcarrier over a period ranging from several minutes to several days.

For topical administration, the agents may be mixed with apharmaceutical carrier at a concentration of about 0.1% to about 10% ofdrug to vehicle. Another mode of administering the agents of theinvention may utilize a patch formulation to affect transdermaldelivery.

Active agents may alternatively be administered in methods of thisinvention by inhalation, via the nasal or oral routes, e.g., in a sprayformulation also containing a suitable carrier.

Exemplary chemical entities useful in methods of the invention will nowbe described by reference to illustrative synthetic schemes for theirgeneral preparation below and the specific examples that follow.Artisans will recognize that, to obtain the various compounds herein,starting materials may be suitably selected so that the ultimatelydesired substituents will be carried through the reaction scheme with orwithout protection as appropriate to yield the desired product.Alternatively, it may be necessary or desirable to employ, in the placeof the ultimately desired substituent, a suitable group that may becarried through the reaction scheme and replaced as appropriate with thedesired substituent. Unless otherwise specified, the variables are asdefined above in reference to Formula (I).

Compounds of Formula (I) where R⁵ is —NH₂ are prepared according toScheme A. Reaction of amines (VII) with (Alk)chloroformates (Alk isC₁₋₃alkyl), such as ethyl chloroformate, in a solvent such as benzene ortoluene, or a mixture thereof, with heating, gives carbamates (VIII).Carbamates (VIII) are reacted with hydrazine, in a solvent such asethanol (EtOH) or isopropanol, or a mixture thereof, to giveamino-pyrimidine-diones (IX), which are de-aminated with NaNO₂ in asolvent such as acetic acid or water, or a mixture thereof, to givepyrimidine-diones (X). Chlorination using standard methods, such asPOCl₃ in a solvent such as diethylaniline or dimethylaniline, withheating, gives dichloropyrimidines (XI). Displacement of the 4-chlorosubstituent with amines, HN(R³)R⁴, is accomplished in a solvent such asEtOH, isopropanol, or t-butanol, or a mixture thereof, in the presenceof a suitable base, such as K₂CO₃ or Na₂CO₃ to give amines (XII). Oneskilled in the art will recognize that diamines HN(R³)R⁴ may be suitablyprotected, and the protecting group removed later in the sequence.Displacement of the 2-chlorosubstituent is performed with protectedamine, H₂NPG, where PG is an alkyl protecting group (preferably, benzyl,p-methoxybenzyl, or phenethyl), in a solvent such as pyridine, withheating and optionally using microwave irradiation, gives diamines(XIII). Subsequent deprotection of PG (as well as any protecting groupon diamines —N(R³)R⁴, such as a Boc group) using methods known in theart, provides compounds of Formula (I).

Compounds of Formula (I) are also prepared according to Scheme B. Forcompounds where R⁵ is —NH₂, condensation of amines (XIV) withchloroformamidine hydrochloride in a high-boiling solvent such asdiglyme, with heating, gives hydroxy-pyrimidines (XV) as thehydrochloride salts. Chlorination is effected by treatment with areagent such as POCl₃ in the presence of a tetraalkylammonium salt, suchas Et₄NCl, in a solvent such as diethylaniline or dimethylaniline togive chlorides (XVI). For compounds where R⁵ is —H, reaction withformamidine in the presence of a strong base, such as KOtBu, provideshydroxyl-pyrimidines (XV). Chlorination with a reagent such as POCl₃ ina solvent such as dimethylaniline or diethylaniline, with heating, givesamino-pyrimidines (XVI) where R⁵ is —H. For all embodiments of R⁵,displacement of the 4-chloro substituent with amines, HN(R³)R⁴, isaccomplished in a solvent such as EtOH or pyridine, to provide compoundsof Formula (I).

Some embodiments of Scheme B are further exemplified by Schemes B.1 andB.2.

Intermediates of formula (VII) (see, for example, structure in Scheme A)may be prepared according to Scheme C. Substituted ketones (XVII), whereR is methyl or fluoro, are converted to nitriles (XVIII) by treatmentwith POCl₃ and H₂NOH in a solvent such as N,N-dimethylformamide (DMF),with heating. Reaction of nitriles (XVIII) with hydroxy- ormercapto-acetic acid esters (Alk is C₁₋₃alkyl), in a solvent such asEtOH, tetrahydrofuran (THF), or DMF, or a mixture thereof, in thepresence of a suitable base, such as K₂CO₃, with heating, providesintermediates (VII). Alternatively, condensation of keto-nitriles (XXI)with ethyl glycolate or ethyl thioglycolate, in the presence of diethylor diisopropyl azodicarboxylate and PPh₃, with or without subsequentaddition of a base such as NaH, in a solvent such as THF, providesintermediates (VII) directly.

Compounds of Formula (I) may be converted to their corresponding saltsusing methods described in the art. For example, an amine of Formula (I)is treated with trifluoroacetic acid (TFA), HCl, or citric acid in asolvent such as diethyl ether, CH₂Cl₂, THF, or methanol (MeOH) toprovide the corresponding salt form. In certain embodiments,corresponding salts may be obtained by reverse phase purification inacetonitrile and water with TFA as an additive to the purificationsolvents.

Compounds prepared according to the schemes described above may beobtained as single enantiomers, diastereomers, or regioisomers, byenantio-, diastero-, or regiospecific synthesis, or by resolution.Compounds prepared according to the schemes above may alternately beobtained as racemic (1:1) or non-racemic (not 1:1) mixtures or asmixtures of diastereomers or regioisomers. Where racemic and non-racemicmixtures of enantiomers are obtained, single enantiomers may be isolatedusing conventional separation methods known to one skilled in the art,such as chiral chromatography, recrystallization, diastereomeric saltformation, derivatization into diastereomeric adducts,biotransformation, or enzymatic transformation. Where regioisomeric ordiastereomeric mixtures are obtained, single isomers may be separatedusing conventional methods such as chromatography or crystallization.

The following specific examples are provided to further illustrate theinvention and various preferred embodiments.

EXAMPLES Chemistry Methods:

In obtaining the compounds described in the examples below and thecorresponding analytical data, the following experimental and analyticalprotocols were followed unless otherwise indicated.

Unless otherwise stated, reaction mixtures were magnetically stirred atroom temperature (rt). Where solutions are “dried,” they are generallydried over a drying agent such as Na₂SO₄ or MgSO₄. Where mixtures,solutions, and extracts were “concentrated”, they were typicallyconcentrated on a rotary evaporator under reduced pressure.

Normal-phase flash column chromatography (FCC) was performed on silicagel (SiO₂) eluting with designated solvents.

Trifluoroacetic acid salt forms of exemplified compounds were obtainedby purification of the crude products by reversed-phase high performanceliquid chromatography (HPLC) under acidic conditions. Reversed-phaseHPLC (acidic conditions) was performed by: 1) a Hewlett Packard HPLCSeries 1100 with a Phenomenex Luna C18 (5 μm, 4.6×150 mm) column,detection at λ=230, 254 and 280 nm, and a gradient of 10 to 99%acetonitrile/water (0.05% trifluoroacetic acid) over 5.0 min with a flowrate of 1 mL/min; or 2) a Shimadzu LC-8A equipped with a YMC Pack ODS250×30 mm column with a gradient of 10 to 50% TFA in acetonitrile and0.05% in water over 15 min at a rate of 70 mL/min.

Alternatively, purification by reversed-phase HPLC (basic conditions)provided compounds in the free base form. Reversed-phase HPLC (basicconditions) was performed on a Dionex APS2000 LC/MS with a PhenomenexGemini C18 (5 μm, 30×100 mm) column, and a gradient of 5 to 100%acetonitrile/water (20 mM NH₄OH) over 16.3 min, and a flow rate of 30mL/min.

Hydrochloride salts were prepared by treating a solution of the freebase in CHCl₃ with HCl (1 M in Et₂O). Concentration of the reactionmixture provided the hydrochloride salts.

Mass spectra (MS) were obtained on an Agilent series 1100 MSD usingelectrospray ionization (ESI) in positive mode unless otherwiseindicated. The MS data presented is the m/z found (typically [M+H]⁺) forthe molecular ion.

Nuclear magnetic resonance (NMR) spectra were obtained on Bruker modelDRX spectrometers. The format of the ¹H NMR data below is: chemicalshift in ppm downfield of the tetramethylsilane reference (multiplicity,coupling constant J in Hz, integration).

Chemical names were generated using ChemDraw Version 6.0.2(CambridgeSoft, Cambridge, Mass.) or ACD/Name Version 9 (AdvancedChemistry Development, Toronto, Ontario, Canada).

Example 1 4-(4-Methyl-piperazin-1-yl)-thieno[3,2-d]pyrimidin-2-ylamine

Step A: 3-Ethoxycarbonylamino-thiophene-2-carboxylic acid methyl ester

To a solution of 3-amino-thiophene-2-carboxylic acid methyl ester (2.39g, 15.2 mmol) in benzene (51 mL) was added K₂CO₃ (6.30 g, 45.6 mmol)followed by ethyl chloroformate (1.74 mL, 18.2 mmol). After heating atreflux for 12 h, the mixture was filtered and the filtrate wasconcentrated to afford the desired product (3.43 g), which was used inthe next step without further purification. MS: 230.0. ¹H NMR (400 MHz,CD₃OD) δ ppm 7.82 (d, J=5.5 Hz, 1H), 7.66 (d, J=5.6 Hz, 1H), 4.23 (q,J=7.1, Hz, 2H), 3.86 (s, 3H), 1.32 (t, J=7.1 Hz, 3H).

Step B: 3-Amino-1H-thieno[3,2-d]pyrimidine-2,4-dione

To a solution of 3-ethoxycarbonylamino-thiophene-2-carboxylic acidmethyl ester (3.43 g, 15.0 mmol) in EtOH (100 mL) was added hydrazinemonohydrate (7.98 mL, 164.6 mmol). After heating at 90° C. for 12 h, themixture was filtered to afford a fine yellow powder (1.70 g), which wasused in the next step without further purification. MS: 184.2. ¹H NMR(400 MHz, CD₃OD) δ ppm 7.93 (d, J=5.3 Hz, 1H), 6.95 (d, J=5.3 Hz, 1H).

Step C: 1H-Thieno[3,2-d]pyrimidine-2,4-dione

To a solution of 3-amino-1H-thieno[3,2-d]pyrimidine-2,4-dione (1.70 g,9.3 mmol) in a 1:1 mixture of acetic acid/H₂O (155 mL) was added sodiumnitrite (1.92 g, 27.8 mmol) portion-wise. The reaction mixture washeated to 60° C. until the evolution of brown gas ceased (2 h). Aceticacid was removed under reduced pressure and the solution was cooled to0° C. The resulting white solid was collected by filtration to afford0.77 g of the desired product. MS: 167.3. ¹H NMR (400 MHz,d₆-N,N-dimethylsulfoxide (d₆-DMSO)) δ ppm 11.40 (br s, 1H), 8.04 (d,J=5.2 Hz, 1H), 6.91 (d, J=5.3 Hz, 1H), 3.34 (br s, 1H).

Step D: 2,4-Dichloro-thieno[3,2-d]pyrimidine

To a solution of 1H-thieno[3,2-d]pyrimidine-2,4-dione (0.77 g, 4.6 mmol)in POCl₃ (2.70 mL) was added diethylaniline (0.29 mL, 1.8 mmol). Afterheating at 100° C. for 12 h in a sealed tube, the mixture was pouredinto ice water and the title compound was filtered from the solution asa brown solid (0.73 g). MS: No signal. ¹H NMR (400 MHz, d₆-DMSO) δ ppm8.71 (d, J=5.5 Hz, 1H), 7.75 (d, J=5.4 Hz, 1H).

Step E: 2-Chloro-4-(4-methyl-piperazin-1-yl)-thieno[3,2-d]pyrimidine

To a solution of 2,4-dichloro-thieno[3,2-d]pyrimidine (0.20 g, 1.0 mmol)in EtOH (3.2 mL) was added K₂CO₃ (0.31 g, 2.2 mmol) followed byN-methylpiperazine (0.13 mL, 1.2 mmol). After stirring at rt for 12 h,the mixture was filtered to afford 0.23 g of the desired product. MS:269.0. ¹H NMR (400 MHz, CD₃OD) δ ppm 8.06 (d, J=5.6 Hz, 1H), 7.27 (d,J=5.6 Hz, 1H), 4.05-4.00 (m, 4H), 2.62-2.56 (m, 4H), 2.36 (s, 3H).

Step F: 4-(4-Methyl-piperazin-1-yl)-thieno[3,2-d]pyrimidin-2-ylamine

To a solution of2-chloro-4-(4-methyl-piperazin-1-yl)-thieno[3,2-d]pyrimidine (0.11 g,0.4 mmol) in pyridine (0.34 mL) in a microwave vial was added4-methoxybenzylamine (0.55 mL, 4.2 mmol). The reaction mixture washeated to 200° C. in the microwave for 1 h, after which pyridine wasremoved under reduced pressure. The resultant residue was purified byFCC (2 M NH₃ in MeOH/CH₂Cl₂) to yield(4-methoxy-benzyl)-[4-(4-methyl-piperazin-1-yl)-thieno[3,2-d]pyrimidin-2-yl]-amine.The intermediate was then dissolved in trifluoroacetic acid (2.5 mL) andheated at 60° C. for 1.5 h. After concentrating, the residue waspurified by reverse-phase chromatography (acidic conditions) to affordthe desired product as a TFA salt (30 mg). MS: 250.1. ¹H NMR (400 MHz,CD₃OD) δ ppm 8.26 (d, J=5.6 Hz, 1H), 7.30 (d, J=5.6 Hz, 1H), 4.65-4.12(m, 4H), 3.60-3.41 (m, 4H), 2.98 (s, 3H).

Example 24-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine

Step A: 2-Chloro-cyclohex-1-enecarbonitrile

To a stirring solution of POCl₃ (15.20 mL, 163 mmol) at 0° C. was addedDMF (13.40 mL, 173 mmol) drop-wise. Monitoring internal temperature,cyclohexanone (10.60 mL, 102 mmol) was slowly added, keeping thetemperature between 35 and 40° C. Upon complete addition, the reactionwas heated to 50° C. and hydroxylamine hydrochloride (40 g, 576 mmol)was added in eight portions, cooling when necessary to control theexothermic reaction. Upon completing this addition, ice was added to thereaction, followed by water (400 mL), and the mixture resumed stirringfor 1 h. Filtration afforded the desired product as a brown solid (8.8g). Some substrates may require an aqueous work-up/extraction procedureif water solubility is too high. EtOAc is generally a good solvent forthis extraction. MS: No signal. ¹H NMR (400 MHz, CDCl₃ δ ppm 2.47-2.36(m, 2H), 2.34-2.25 (m, 2H), 1.78-1.67 (m, 1H), 1.67-1.58 (m, 1H).

Step B: 3-Amino-4,5,6,7-tetrahydro-benzo[b]thiophene-2-carboxylic acidethyl ester

A 250 mL flask was charged with 2-chloro-cyclohex-1-enecarbonitrile (3.0g, 21 mmol) in a 6:1 mixture of EtOH/THF (42 mL), K₂CO₃ (2.9 g, 21mmol), and mercapto-acetic acid ethyl ester (3.5 mL, 32 mmol), afterwhich it was fitted with a reflux condenser under N₂ atmosphere andheated to 90° C. for 24 h. The mixture was filtered through a pad ofdiatomaceous earth, such as Celite®, rinsing thoroughly with MeOH (400mL). After concentration, the title compound was purified by FCC (60%ethyl acetate (EtOAc)/hexanes) to give an amber-colored oil (4.8 g). MS:226.1. ¹H NMR (400 MHz, CDCl₃) δ ppm 5.35 (s, 2H), 2.71-2.64 (m, 2H),2.36-2.26 (m, 2H), 1.87-1.77 (m, 4H), 1.33 (t, J=7.1 Hz, 3H).

Step C:2-Amino-6,7,8,9-tetrahydro-1H-benzo[4,5]thieno[3,2-d]pyrimidin-4-one

A 48 mL sealed tube was charged with3-amino-4,5,6,7-tetrahydro-benzo[b]thiophene-2-carboxylic acid ethylester (2.8 g, 12.3 mmol), chloroformamidine hydrochloride (2.0 g, 17.2mmol), and diethylene glycol dimethyl ether (24.6 mL). The tube wassealed and heated to 160° C. for 12 h with vigorous stirring. Filtrationafforded the desired compound as a beige solid (2.6 g). MS: No signal.¹H NMR (400 MHz, d₆-DMSO) δ ppm 2.84-2.73 (m, 2H), 2.58-2.51 (m, 2H),1.89-1.70 (m, 4H).

Step D:4-Chloro-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine

In a 15 mL flask,2-amino-6,7,8,9-tetrahydro-1H-benzo[4,5]thieno[3,2-d]pyrimidin-4-one(0.2 g, 0.9 mmol) and tetraethyl ammonium chloride (0.3 g, 1.8 mmol)were dried under vacuum at 100° C. for 12 h. Addition of acetonitrile(1.80 mL), dimethylaniline (0.12 mL, 0.9 mmol) and POCl₃ (0.50 mL, 5.42mmol) followed, and the reaction mixture was heated to 110° C. for 15min. The solution was concentrated and ice was added along with CHCl₃ (5mL). The aqueous layer pH was adjusted to pH=7 with saturated (satd.)aq. NaHCO₃ and extraction from that layer proceeded with CHCl₃ (3×20mL). The combined organic layers were dried (Na₂SO₄) and concentrated.The resultant residue was purified by FCC (50% EtOAc/hexanes) to affordthe desired product as a pale yellow solid (88 mg). Certain substrateswere found to be unstable at higher temperatures, in which caseprolonged heating at lower temperature (in a range such as from about50° C. to about 60° C.) sufficed. MS: 240.0. ¹H NMR (400 MHz, CDCl₃) δppm 5.08 (s, 2H), 2.90-2.83 (m, 2H), 2.74-2.67 (m, 2H), 1.98-1.91 (m,2H), 1.91-1.83 (m, 2H).

Step E:4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine

To a solution of4-chloro-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine(0.09 mg, 0.37 mmol) in EtOH (3.7 mL) was added K₂CO₃ (0.12 g, 0.84mmol) followed by N-methylpiperazine (0.05 mL, 0.44 mmol). Afterstirring at rt for 22 h, EtOH was removed under reduced pressure and themixture was dissolved in CH₂Cl₂ (5 mL) and poured over H₂O (10 mL). Theaqueous layer was extracted with CH₂Cl₂ (3×10 mL). The combined organiclayers were washed with brine, such as with a satd. aq. NaCl, (30 mL),dried, for example with Na₂SO₄, and concentrated to afford the titlecompound (0.05 g) as a pale yellow solid. MS: 304.2. ¹H NMR (400 MHz,CD₃OD) δ ppm 3.93-3.88 (m, 4H), 2.80 (t, J=6.0 Hz, 2H), 2.63 (t, J=6.1Hz, 2H), 2.56-2.52 (m, 4H), 2.33 (s, 3H), 1.96-1.81 (m, 4H).

Example 34-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine

To a solution of4-(2-amino-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-4-yl)-piperazine-1-carboxylicacid (synthesized by the route described in Example 2, Steps A-D; 0.093g, 0.5 mmol) in formic acid (3 mL) was added 6 N aq. HCl (0.5 mL, 3.0mmol). After stirring at rt for 1 h, the reaction mixture wasconcentrated and purified by reverse-phase chromatography (acidicconditions) to afford the desired product as a TFA salt (0.009 g). MS:290.1. ¹H NMR (400 MHz, CD₃OD) δ ppm 3.92-3.81 (m, 4H), 2.92-2.87 (m,4H), 2.82-2.75 (m, 2H), 2.62 (t, J=6.0 Hz, 2H), 1.96-1.80 (m, 4H).

Example 44-[(3aR,6aR)-Hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine

A 90 mL parr shaker was charged with4-[1-(1-phenyl-ethyl)-hexahydro-pyrrolo[3,4-b]pyrrol-5-yl]-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylaminetrifluoroacetate (synthesized by route described in Example 2, StepsA-E; 0.20 g, 0.4 mmol), Pd(OH)₂/C (30% by weight, 0.06 g) and EtOH (3.7mL). The mixture was submitted to 60 psi H₂ with shaking for 36 h. Thereaction mixture was filtered through a pad of diatomaceous earth andconcentrated to afford the desired compound (0.12 g). MS: 316.1. ¹H NMR(400 MHz, CD₃OD) δ ppm 4.47-4.29 (m, 2H), 4.25-4.07 (m, 2H), 3.91-3.80(m, 1H), 3.54-3.38 (m, 3H), 2.97-2.84 (m, 2H), 2.69-2.61 (m, 2H),2.41-2.29 (m, 1H), 2.14-2.02 (m, 1H), 2.02-1.86 (m, 4H).

Example 54-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-2-ylamine

Step A: 3-Amino-4,5,6,7-tetrahydro-benzofuran-2-carboxylic acid ethylester

A solution of resin bound PPh₃ (Polymer Laboratories, 1.48 mmol/g,150-300 μM; 3.8 g, 5.7 mmol) in THF (35 mL) at 0° C. was treated withdiethyl azodicarboxylate (40% wt. in hexane; 2.60 mL, 5.7 mmol), ethylglycolate (0.54 mL, 5.7 mmol) and a solution of2-oxo-cyclohexanecarbonitrile (0.5 g, 4.1 mmol) in THF (10 mL). Thereaction mixture warmed to rt over 12 h. Filtration and concentrationafforded the uncyclized intermediate, which was dissolved in THF (25 mL)and added drop-wise to a slurry of sodium hydride (95%; 0.29 g, 11.4mmol) in THF (10 mL) at 0° C. The reaction mixture was heated to 40° C.for 12 h. The reaction was quenched with satd. aq. NH₄Cl (5 mL) and themixture was extracted with EtOAc (3×50 mL). The combined organic layerswere dried (by using, for example, Na₂SO₄) and concentrated.Purification by FCC (50% EtOAc/hexanes) afforded the desired product asa pale yellow solid (0.36 g). MS: 210.2. ¹H NMR (400 MHz, CD₃OD) δ ppm4.26 (q, J=7.1, Hz, 2H), 2.55-2.47 (m, 2H), 2.35-2.28 (m, 2H), 1.90-1.79(m, 2H), 1.79-1.71 (m, 2H), 1.33 (t, J=7.1, Hz, 3H).

Step B:2-Amino-6,7,8,9-tetrahydro-1H-benzo[4,5]furo[3,2-d]pyrimidin-4-one

The title compound was synthesized by the route described in Example 2,Step B. MS: No signal. ¹H NMR (400 MHz, d₆-DMSO) δ ppm 2.68 (t, J=6.0,Hz, 2H), 2.46 (t, J=5.8, Hz, 2H), 1.88-1.77 (m, 2H), 1.77-1.68 (m, 2H).

Step C:4-Chloro-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-2-ylamine

The title compound was synthesized by the route described in Example 2,Step C, substituting diethylaniline for dimethylaniline. MS: 224.1. ¹HNMR (400 MHz, CD₃OD) δ ppm 2.79-2.72 (m, 2H), 2.60-2.54 (m, 2H),2.01-1.92 (m, 2H), 1.88-1.80 (m, 2H).

Step D:4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-2-ylamine

The title compound was synthesized by the route described in Example 2,Step D. Purification by reverse-phase HPLC (acidic conditions) providedthe title compound as the TFA salt. MS: 288.2. ¹H NMR (500 MHz, CD₃OD) δppm 3.85-3.34 (m, 8H), 2.99 (s, 3H), 2.80 (t, J=6.2 Hz, 2H), 2.61 (t,J=6.0 Hz, 2H), 2.03-1.92 (m, 2H), 1.91-1.84 (m, 2H).

Example 64-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-2-ylamine

The title compound was prepared from4-(2-amino-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-4-yl)-piperazine-1-carboxylicacid tert-butyl ester (synthesized by the route described in Example 5,Steps A-D) by using the conditions described in Example 3. MS: 274.2. ¹HNMR (500 MHz, CD₃OD) δ ppm 4.46-4.26 (m, 4H), 3.48-3.37 (m, 4H), 2.80(t, J=6.2 Hz, 2H), 2.61 (t, J=6.0 Hz, 2H), 2.03-1.92 (m, 2H), 1.92-1.82(m, 2H).

Example 74-[(3aR,6aR)-Hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine

The title compound was prepared from4-[1-(1-phenyl-ethyl)-hexahydro-pyrrolo[3,4-b]pyrrol-5-yl]-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-2-ylamine(synthesized by the route described in Example 5, Steps A-D) using theconditions described in Example 4. MS: 300.2. ¹H NMR (400 MHz, CD₃OD) δppm 4.54-3.98 (m, 3H), 3.97-3.58 (m, 2H), 3.39-3.04 (m, 3H), 2.59 (t,J=5.7 Hz, 2H), 2.40 (t, J=5.7 Hz, 2H), 2.28-2.12 (m, 1H), 2.01-1.83 (m,1H), 1.83-1.73 (m, 2H), 1.73-1.62 (m, 2H).

Example 84-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidine

Step A: 6,7,8,9-Tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-4-ol

A 15 mL flask was charged with3-amino-4,5,6,7-tetrahydro-benzo[b]thiophene-2-carboxylic acid ethylester (synthesized by the route described in Example 5, Step A; 0.50 g,2.4 mmol), formamide (4.8 mL), and KO^(t)Bu (95%; 0.56 g, 4.8 mmol)under N₂. After heating at 110° C. for 12 h, the mixture was poured overcold satd. aq. NH₄Cl (10 mL). Filtration afforded the desired product(0.31 g). MS: No signal. ¹H NMR (400 MHz, d₆-DMSO) δ ppm 8.00 (s, 1H),2.74-2.69 (m, 2H), 2.56-2.51 (m, 2H), 1.92-1.81 (m, 2H), 1.79-1.69 (m,2H).

Step B: 4-Chloro-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidine

A 15 mL sealed tube was charged with6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-4-ol (0.31 g, 1.6mmol) and POCl₃ (3 mL), sealed, and heated to 110° C. After 30 min,POCl₃ was removed under reduced pressure and the resultant residue waspurified by FCC (40% EtOAc/hexanes) to afford the desired product as awhite solid (0.27 g). MS: 189.0 (negative mode). ¹H NMR (400 MHz,d₆-DMSO) δ ppm 8.00 (s, 1H), 2.74-2.67 (m, 2H), 2.57-2.51 (m, 2H),1.90-1.82 (m, 2H), 1.80-1.70 (m, 2H).

Step C:4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidine

The title compound was prepared by subjecting4-chloro-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidine to theconditions described in Example 2, Step E. MS: 273.1. ¹H NMR (400 MHz,CD₃OD) δ ppm 8.27 (s, 1H), 4.09-4.01 (m, 4H), 2.80-2.73 (m, 2H),2.67-2.60 (m, 2H), 2.59-2.55 (m, 4H), 2.35 (s, 3H), 2.03-1.92 (m, 2H),1.90-1.81 (m, 2H).

Example 94-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidine

The title compound was prepared from4-(6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-4-yl)-piperazine-1-carboxylicacid tert-butyl ester (prepared by the synthesis described in Example 8)according to the deprotection methods described in Example 3. MS: 259.1.¹H NMR (400 MHz, CD₃OD) δ ppm 8.27 (s, 1H), 4.03-3.98 (m, 4H), 2.99-2.89(m, 4H), 2.80-2.73 (m, 2H), 2.66-2.59 (m, 2H), 2.02-1.93 (m, 2H),1.89-1.81 (m, 2H).

Example 104-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidine

The title compound was prepared from3-amino-4,5,6,7-tetrahydro-benzo[b]thiophene-2-carboxylic acid ethylester (prepared by the synthesis described in Example 2, Steps A-B)using the conditions described in Example 8, Steps A-C. MS: 289.1. ¹HNMR (400 MHz, CD₃OD) δ ppm 8.41 (s, 1H), 4.02-3.95 (m, 4H), 2.86 (t,J=6.0 Hz, 2H), 2.73 (t, J=6.1 Hz, 2H), 2.61-2.53 (m, 4H), 2.34 (s, 3H),1.99-1.84 (m, 4H).

Example 114-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidine

The title compound was prepared from4-(6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-4-yl)-piperazine-1-carboxylicacid tert-butyl ester (prepared by the synthesis described in Example10) according to the deprotection methods described in Example 3. MS:275.1. ¹H NMR (400 MHz, CD₃OD) δ ppm 8.39 (s, 1H), 4.01-3.90 (m, 4H),2.99-2.90 (m, 4H), 2.85 (t, J=5.9 Hz, 2H), 2.76-2.69 (m, 2H), 2.01-1.82(m, 4H)

The compounds in Examples 12-151 were prepared using methods analogousto those described in the preceding examples.

Structure Chemical Name, MS Data, NMR Data

Example 12 7-Methyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]thieno[3,2-d]pyrimidin-2-amine MS: 264.1 ¹H NMR (400 MHz, CD₃OD) δ ppm 7.43 (d, J =1.1 Hz, 1H), 4.06-3.92 (m, 2H), 3.91-3.78 (m, 1H), 3.64 (dd, J = 10.8,4.9 Hz, 1H), 3.40-3.33 (m, 1H), 2.42 (s, 3H), 2.29-2.19 (m, 4H),1.97-1.86 (m, 1H)

Example 13 7-Methyl-4-(4-methylpiperazin-1-yl)thieno- aminetrifluoroacetic acid salt MS: 264.1 ¹H NMR (400 MHz, CD₃OD) δ ppm 7.91(d, J = 1.1 Hz, 1H), 4.74-4.00 (m, 4H), 3.61-3.39 (m, 4H), 2.98 (s, 3H),2.39 (d, J = 1.0 Hz, 3H)

Example 14 7-Bromo-4-(3R)-3-(methylamino)pyrrolidin-1-yl-d]pyrimidin-2-amine trifluoroacetic acid salt MS: 328.0 ¹H NMR (400 MHz,CD₃OD) δ ppm 8.34 (s, 1H), 4.35-4.08 (m, 4H), 4.08-3.95 (m, 1H), 2.82(s, 3H), 2.75-2.58 (m, 1H), 2.57-2.41 (m, 1H)

Example 156-tert-Butyl-4-(4-methylpiperazin-1-yl)thieno[3,2-d]pyrimidin- 2-aminetrifluoroacetic acid salt MS: 306.2 ¹H NMR (400 MHz, CD₃OD) δ ppm 7.12(s, 1H), 4.85-3.85 (m, 4H), 3.61-3.40 (m, 4H), 2.98 (s, 3H), 1.48 (s,9H)

Example 16 6-tert-Butyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl-d]pyrimidin-2-amine trifluoroacetic acid salt MS: 306.2 ¹H NMR (400MHz, CD₃OD) δ ppm 7.08 (s, 1H), 4.52-3.85 (m, 5H), 2.81 (s, 3H),2.73-2.22 (m, 2H), 1.47 (s, 9H)

Example 17 6-tert-Butyl-4-piperazin-1-ylthieno[3,2-d]pyrimidin-2-aminetrifluoroacetic acid salt MS: 292.2 ¹H NMR (400 MHz, CD₃OD) δ ppm 7.03(s, 1H), 4.27-4.22 (m, 4H), 3.37-3.33 (m, 4H), 1.38 (s, 9H)

Example 18 4-[(3R)-3-Aminopyrrolidin-1-yl]-6-tert-butylthieno[3,2-d]pyrimidin-2-amine trifluoroacetic acid salt MS: 292.2 ¹H NMR (400 MHz,CD₃OD) δ ppm 7.12-7.07 (m, 1H), 4.47-3.92 (m, 5H), 2.70-2.13 (m, 2H),1.47 (s, 9H)

Example 19 6-tert-Butyl-4-(octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl)thieno[3,2-d]pyrimidin-2-amine trifluoroacetic acid salt MS: 332.2 ¹HNMR (400 MHz, CD₃OD) δ ppm 7.08 (s, 1H), 4.36-4.28 (m, 1H), 4.27-4.18(m, 1H), 4.15-4.05 (m, 1H), 4.04-3.94 (m, 2H), 3.44-3.35 (m, 1H),3.15-2.78 (m, 2H), 2.07-1.76 (m, 4H), 1.47 (s, 9H)

Example 20 4-[(4aR,7aR)-Octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine trifluoroaceticacid salt MS: 314.2 ¹H NMR (500 MHz, CD₃OD) δ ppm 4.42-4.13 (m, 2H),4.11-4.02 (m, 1H), 4.01-3.95 (m, 2H), 3.45-3.35 (m, 1H), 3.17-3.03 (m,1H), 3.02-2.82 (m, 1H), 2.81-2.73 (m, 2H), 2.60 (t, J = 5.34 Hz, 2H),2.05-1.92 (m, 4H), 1.92-1.79 (m, 4H)

Example 21 4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine trifluoro acid salt MS:288.1 ¹H NMR (500 MHz, CD₃OD) δ ppm 4.44-4.11 (m, 2H), 4.11-3.82 (m,3H), 2.86-2.80 (m, 3H), 2.80-2.74 (m, 2H), 2.64-2.56 (m, 2H), 2.55-2.22(m, 2H), 2.03-1.91 (m, 2H), 1.91-1.82 (m, 2H)

Example 22 4-(1,4-Diazepan-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine trifluoroacetic acid salt MS: 288.2 ¹H NMR (400 MHz,CD₃OD) δ ppm 4.43-4.32 (m, 1H), 4.29-4.17 (m, 2H), 4.14-4.04 (m, 1H),3.61-3.52 (m, 1H), 3.52-3.45 (m, 1H), 3.45-3.35 (m, 2H), 2.77 (t, J =6.2 Hz, 2H), 2.59 (t, J = 6.0 Hz, 2H), 2.33-2.14 (m, 2H), 2.04-1.91 (m,2H), 1.91-1.81 (m, 2H)

Example 23 4-(3-Aminoazetidin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,s-d]pyrimidin-2-amine trifluoroacetic acid salt MS: 260.1 ¹H NMR (400 MHz,CD₃OD) δ ppm 5.01-4.94 (m, 1H), 4.76-4.51 (m, 2H), 4.46-4.24 (m, 2H),2.75 (t, J = 6.1 Hz, 2H), 2.58 (t, J = 5.9 Hz, 2H), 2.03-1.91 (m, 2H),1.90-1.81 (m, 2H)

Example 24 4-[(3R)-3-Aminopyrrolidin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine trifluoroacetic acid saltMS: 274.2 ¹H NMR (400 MHz, CD₃OD) δ ppm 4.39-3.87 (m, 5H), 2.81-2.73 (m,2H), 2.58 (t, J = 5.9 Hz, 2H), 2.56-2.39 (m, 1H), 2.37-2.12 (m, 1H),2.04-1.91 (m, 2H), 1.91-1.81 (m, 2H)

Example 25 N4-(2-Aminoethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine trifluoroacetic acid salt MS: 248.2 ¹H NMR (400MHz, CD₃OD) δ ppm 3.82-3.78 (m, 2H), 3.25-3.21 (m, 2H), 2.75-2.70 (m,2H), 2.56 (t, J = 5.9 Hz, 2H), 2.00-1.89 (m, 2H), 1.89-1.79 (m, 2H)

Example 26 4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine MS: 300.2 ¹H NMR (400MHz, CD₃OD) δ ppm 4.53-4.46 (m, 1H), 3.61-3.50 (m, 1H), 3.25-3.14 (m,1H), 2.67 (t, J = 6.2 Hz, 2H), 2.52 (t, J = 6.0 Hz, 2H), 2.00-1.88 (m,2H), 1.88-1.72 (m, 6H)

Example 27N-(6,7,8,9-Tetrahydro[1]benzofuro[3,2-d]pyrimidin-4-yl]ethane-1,2-diamine MS: 233.1 ¹H NMR (400 MHz, CD₃OD) δ ppm 8.25 (s, 1H), 3.66(t, J = 6.2 Hz, 2H), 2.95 (t, J = 6.2 Hz, 2H), 2.81-2.73 (m, 2H),2.67-2.59 (m, 2H), 2.02-1.91 (m, 2H), 1.90-1.81 (m, 2H)

Example 28 (3R)-N-Methyl-1-(6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-4-yl)pyrrolidin-3-amine MS: 273.1 ¹H NMR (400 MHz, CD₃OD) δppm 8.21 (s, 1H), 4.18-3.61 (m, 4H), 3.48-3.35 (m, 1H), 2.85-2.71 (m,2H), 2.68-2.59 (m, 2H), 2.43 (s, 3H), 2.32-2.20 (m, 1H), 2.07-1.91 (m,3H), 1.90-1.81 (m, 2H)

Example 29 N-(6,7,8,9 - Tetrahydro[1]benzothieno[3,2-d]pyrimidin-4-yl)ethane-1,2-diamine MS: 249.1 ¹H NMR (400 MHz, CD₃OD) δ ppm 8.37 (s,1H), 3.65 (t, J = 6.3 Hz, 2H), 2.93 (t, J = 6.3 Hz, 2H), 2.90-2.83 (m,2H), 2.77-2.69 (m, 2H), 2.01-1.80 (m, 4H)

Example 30 (3R)-N-Methyl-1-(6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-4-yl)pyrrolidin-3-amine MS: 289.0 ¹H NMR (400 MHz, CD₃OD) δppm 8.29 (s, 1H), 4.13-3.94 (m, 2H), 3.94-3.79 (m, 1H), 3.74-3.61 (m,1H), 3.43-3.34 (m, 1H), 2.86 (t, J = 5.9 Hz, 2H), 2.72 (t, J = 5.9 Hz,2H), 2.43 (s, 3H), 2.32-2.20 (m, 1H), 2.01-1.83 (m, 5H)

Example 31 4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine MS: 304.1 ¹H NMR (400MHz, CD₃OD) δ ppm 4.02-3.91 (m, 2H), 3.87-3.77 (m, 1H), 3.62 (dd, J =10.9, 5.0 Hz, 1H), 3.37-3.33 (m, 1H), 2.80 (t, J = 5.9 Hz, 2H), 2.62 (t,J = 6.0 Hz, 2H), 2.42 (s, 3H), 2.28-2.17 (m, 1H), 1.96-1.81 (m, 5H)

Example 32 4-[(4aR,7aR)-Octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-,d]pyrimidin-2-amine MS: 330.1 ¹HNMR (400 MHz, CD₃OD) δ ppm 3.93-3.69 (m, 4H), 3.40-3.35 (m, 1H),2.95-2.88 (m, 1H), 2.78 (t, J = 5.8 Hz, 1H), 2.66-2.57 (m, 3H),2.45-2.31 (m, 1H), 1.96-1.82 (m, 4H), 1.82-1.75 (m, 2H), 1.71-1.57 (m,1H), 1.54-1.45 (m, 1H)

Example 33 4-Hexahydropyrrolo[3 4-c]pyrrol-2(1H)-yl]6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine MS: 316.1 ¹H NMR (400MHz, CD₃OD) δ ppm 4.05-3.96 (m, 2H), 3.71 (dd, J = 11.1, 3.4 Hz, 2H),3.12 (dd, J = 11.4, 7.2 Hz, 1H), 3.02-2.93 (m, 2H), 2.85-2.74 (m, 4H),2.62 (t, J = 5.5 Hz, 2H), 1.95-1.82 (m, 4H)

Example 34 4-[(3S)-3-Aminopiperidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine MS: 304.1 ¹H NMR (400MHz, CD₃OD) δ ppm 4.64-4.57 (m, 1H), 4.50-4.42 (m, 1H), 3.19-3.10 (m,1H), 2.94-2.86 (m, 1H), 2.84-2.76 (m, 3H), 2.65-2.60 (m, 2H), 2.07-1.99(m, 1H), 1.96-1.77 (m, 5H), 1.65-1.52 (m, 1H), 1.48-1.35 (m, 1H)

Example 35 4-[(1S,4S)-2,5-Diazabicyclo]2.2.1-2-yl]hept-2-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine MS: 302.1 ¹H NMR (400MHz, CD₃OD) δ ppm 5.07-4.99 (m, 1H), 4.15 (dd, J = 21.0, 8.8 Hz, 1H),3.94-3.60 (m, 2H), 3.36-3.33 (m, 2H), 3.12-2.97 (m, 1H), 2.86-2.72 (m,2H), 2.65-2.57 (m, 2H), 2.05-1.96 (m, 1H), 1.96-1.77 (m, 4H)

Example 36 4-[(1R,4R)-2,5-Diazabicyclo[2.2.1]hept-2-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine MS: 302.1 ¹H NMR (400MHz, CD₃OD) δ ppm 5.07-4.99 (m, 1H), 4.15 (dd, J = 20.7, 8.8 Hz, 1H),3.93-3.63 (m, 2H), 3.37-3.33 (m, 2H), 3.14-2.99 (m, 1H), 2.84-2.73 (m,2H), 2.61 (t, J = 5.9 Hz, 2H), 2.05-1.97 (m, 1H), 1.96-1.79 (m, 4H)

Example 37 4-(1,4-Diazepan-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine hydrochloric acid salt MS: 304.1 ¹H NMR (400 MHz,(CD3)2OS) δ ppm 4.19-4.09 (m, 1H), 4.08-4.02 (m, 1H), 4.00-3.90 (m, 1H),3.21-3.14 (m, 3H), 2.82-2.72 (m, 3H), 2.60-2.53 (m, 2H), 2.17-2.06 (m,2H), 1.91-1.71 (m, 5H)

Example 38 (3S,4S)-1-(2-Amino-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-4-yl)-4-(methylamino)pyrrolidin-3-of trifluoroacetic acidsalt MS: 320.2 1H NMR (400 MHz, CD₃OD) δ ppm 4.77-4.56 (m, 1H),4.48-4.18 (m, 2H), 4.16-4.00 (m, 1H), 3.99-3.84 (m, 1H), 3.82-3.70 (m,1H), 2.92 (t, J = 5.0 Hz, 2H), 2.86 (s, 3H), 2.66 (t, J = 5.2 Hz, 2H),2.00-1.88 (m, 4H)

Example 39 4-[(3R)-3-(Dimethylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine trifluoroacetic acidsalt MS: 318.2 ¹H NMR (400 MHz, CD₃OD) δ ppm 4.48-4.17 (m, 2H),4.15-3.92 (m, 3H), 2.99 (s, 6H), 2.95-2.89 (m, 2H), 2.76-2.54 (m, 3H),2.53-2.29 (m, 1H), 2.03-1.86 (m, 4H)

Example 40 4-[(3R)-3-(Ethylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine trifluoroacetic acidsalt MS: 318.2 ¹H NMR (400 MHz, CD₃OD) δ ppm 4.29-4.13 (m, 2H),4.12-4.00 (m, 3H), 3.26-3.11 (m, 2H), 2.92 (t, J = 5.0 Hz, 2H), 2.66 (t,J = 5.1 Hz, 2H), 2.63-2.53 (m, 1H), 2.46-2.27 (m, 1H), 2.01-1.87 (m,4H), 1.36 (t, J = 7.3 Hz, 3H)

Example 41 4-[(3R)-3-(Aminomethyl)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine trifluoroacetic acidsalt MS: 304.2 1H NMR (400 MHz, CD₃OD) δ ppm 4.36-3.95 (m, 2H),3.87-3.63 (m, 1H), 3.63-3.45 (m, 1H), 3.24-3.00 (m, 2H), 2.91 (t, J =5.0 Hz, 2H), 2.84-2.70 (m, 1H), 2.65 (t, J = 5.0 Hz, 2H), 2.50-2.20 (m,1H), 2.06-1.88 (m, 4H), 1.88-1.75 (m, 1H)

Example 424-(3-Aminoazetidin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine trifluoroacetic acid salt MS: 276.1 ¹H NMR (400 MHz,CD₃OD) δ ppm 4.86-4.64 (m, 2H), 4.63-4.38 (m, 2H), 4.38-4.29 (m, 1H),2.96-2.88 (m, 2H), 2.71-2.62 (m, 2H), 2.01-1.87 (m, 4H)

Example 43 8-Methyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine trifluoroacetic acidsalt MS: 318.2 ¹H NMR (400 MHz, CD₃OD) δ ppm 4.64-3.99 (m, 3H),3.67-3.35 (m, 4H), 3.05-2.89 (m, 5H), 2.84 (dd, J = 16.4, 5.1 Hz, 2H),2.25-2.13 (m, 1H), 2.11-1.88 (m, 2H), 1.65-1.47 (m, 1H), 1.16 (d, J =6.6 Hz, 3H)

Example 44 8-Methyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine trifluoroacetic acidsalt MS: 318.1 1H NMR (400 MHz, CD₃OD) δ ppm 4.48-4.04 (m, 4H),4.02-3.86 (m, 1H), 3.06-2.87 (m, 2H), 2.86-2.76 (m, 4H), 2.71-2.56 (m,1H), 2.55-2.37 (m, 1H), 2.24-2.13 (m, 1H), 2.11-2.01 (m, 1H), 2.01-1.90(m, 1H), 1.64-1.48 (m, 1H), 1.16 (d, J = 6.5 Hz, 3H)

Example 45 8-Methyl-4-[(4aR,7aR)-octahydro-6H-pyrrolo-[3,4-b]pyridin-6-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminetrifluoroacetic acid salt MS: 344.1 ¹H NMR (400 MHz, CD₃OD) δ ppm4.40-4.17 (m, 2H), 4.15-3.88 (m, 3H), 3.45-3.36 (m, 1H), 3.17-2.88 (m,4H), 2.82 (dd, J = 16.0, 5.0 Hz, 1H), 2.26-2.13 (m, 1H), 2.13-1.78 (m,6H), 1.65-1.49 (m, 1H), 1.16 (d, J = 6.6 Hz, 3H)

Example 46 4-(4-Methylpiperazin-1-yl)-7,8,9,10-tetrahydro-6H-cyclohepta[4,5]thieno[3,2-d]pyrimidin-2-amine trifluoroacetic acid saltMS: 318.1 ¹H NMR (400 MHz, CD₃OD) δ ppm 4.78-3.83 (m, 3H), 3.72-3.38 (m,4H), 3.37-3.33 (m, 1H), 3.05-2.99 (m, 2H), 2.98 (s, 3H), 2.89-2.83 (m,2H), 2.05-1.93 (m, 2H), 1.83-1.75 (m, 2H), 1.75-1.66 (m, 2H)

Example 47 4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-7,8,9,10-tetrahydro-6H-cyclohepta[4,5-d]pyrimidin-2-amine trifluoroacetic acid salt MS:318.1 ¹H NMR (400 MHz, CD₃OD) δ ppm 4.51-4.05 (m, 4H), 4.03-3.85 (m,1H), 3.06-2.92 (m, 2H), 2.87-2.83 (m, 1H), 2.81 (s, 3H), 2.72-2.54 (m,1H), 2.53-2.21 (m, 1H), 2.06-1.89 (m, 2H), 1.82-1.74 (m, 2H), 1.74-1.66(m, 2H)

Example 48 4-[(4aR,7aR)-Octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-7,8,9,10-tetrahydro-6H-cyclohepta[4,5-d]pyrimidin-2- aminetrifluoroacetic acid salt MS: 344.1 ¹H NMR (400 MHz, CD₃OD) δ ppm4.40-4.17 (m, 2H), 4.14-3.91 (m, 3H), 3.43-3.33 (m, 1H), 3.16-2.94 (m,4H), 2.90-2.77 (m, 2H), 2.04-1.93 (m, 4H), 1.93-1.81 (m, 2H), 1.82-1.74(m, 2H), 1.73-1.66 (m, 2H)

Example 49 4-[4-(2-Aminoethyl)piperazin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine trifluoroacetic acidsalt MS: 333.2 ¹H NMR (400 MHz, CD₃OD) δ ppm 4.22-4.10 (m, 4H),3.19-3.11 (m, 2H), 3.09-2.87 (m, 3H), 2.83-2.71 (m, 5H), 2.70-2.63 (m,2H), 2.03-1.88 (m, 4H)

Example 50 4-[4-(1-Methylethyl)piperazin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine trifluoro acid salt MS:332.2 ¹H NMR (400 MHz, CD₃OD) δ ppm 4.10-3.36 (m, 9H), 2.92 (t, J = 4.8Hz, 2H), 2.71-2.65 (m, 2H), 2.02-1.88 (m, 4H), 1.42 (s, 3H), 1.40 (s,3H)

Example 514-(4-Ethylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine trifluoroacetic acid salt MS: 318.2 ¹H NMR (400 MHz,CD₃OD) δ ppm 3.65-3.36 (m, 8H), 3.26 (q, J = 7.3 Hz, 2H), 2.92 (t, J =5.1 Hz, 2H), 2.68 (t, J = 5.2 Hz, 2H), 2.01-1.89 (m, 4H), 1.39 (t, J =7.3 Hz, 3H)

Example 52 4-(Hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine trifluoroacetic acidsalt MS: 330.2 ¹H NMR (400 MHz, CD₃OD) δ ppm 4.83-4.62 (m, 1H),4.53-4.13 (m, 2H), 4.12-3.79 (m, 2H), 3.79-3.37 (m, 4H), 2.92 (t, J =5.0 Hz, 2H), 2.68 (t, J = 5.1 Hz, 2H), 2.41-2.28 (m, 1H), 2.28-2.16 (m,1H), 2.16-2.04 (m, 1H), 2.02-1.86 (m, 5H)

Example 53 4-(Octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-6,7,8,9-tetrahydro[1]benzothieno-3,2-d]pyrimidin-2-amine trifluoroacetic acidsalt MS: 344.2 ¹H NMR (400 MHz, CD₃OD) δ ppm 5.11-4.93 (m, 3H),3.80-3.64 (m, 1H), 3.64-3.56 (m, 1H), 3.55-3.47 (m, 1H), 3.47-3.37 (m,1H), 3.36-3.32 (m, 1H), 3.29-3.19 (m, 1H), 3.07-2.95 (m, 1H), 2.92 (t, J= 5.3 Hz, 1H), 2.68 (t, J = 5.1 Hz, 2H), 2.12-1.77 (m, 8H), 1.76-1.55(m, 2H)

Example 54 4-(5,6-Dihydro[1,2,4-a]pyrazin-7(8H)-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine trifluoroacetic acidsalt MS: 328.2 ¹H NMR (400 MHz, CD₃OD) δ ppm 8.65-8.59 (m, 1H), 5.46 (s,2H), 4.51 (t, J = 5.3 Hz, 2H), 4.43-4.38 (m, 2H), 2.95 (t, J = 5.0 Hz,2H), 2.68 (t, J = 5.1 Hz, 2H), 2.03-1.89 (m, 4H)

Example 55 4-[(3S)-3-(Methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine trifluoroacetic acidsalt MS: 304.2 ¹H NMR (400 MHz, CD₃OD) δ ppm 4.26-4.07 (m, 4H),4.07-3.92 (m, 1H), 2.92 (t, J = 4.9 Hz, 2H), 2.81 (s, 3H), 2.66 (t, J =5.0 Hz, 2H), 2.63-2.51 (m, 1H), 2.48-2.30 (m, 1H), 2.01-1.87 (m, 4H)

Example 56 4-[(3R)-3-Aminopyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine trifluoracetic acidsalt MS: 290.2 ¹H NMR (400 MHz, CD₃OD) δ ppm 4.23-4.01 (m, 5H), 2.92 (t,J = 5.0 Hz, 2H), 2.66 (t, J = 5.1 Hz, 2H), 2.62-2.46 (m, 1H), 2.41-2.21(m, 1H), 1.99-1.87 (m, 4H)

Example 57 8,8-Difluoro-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine trifluoroacetic acidsalt MS: 340.2 ¹H NMR (400 MHz, CD₃OD) δ ppm 4.67-3.99 (m, 4H),3.61-3.41 (m, 4H), 3.25 (t, J = 13.9 Hz, 2H), 3.18 (t, J = 6.4 Hz, 2H),2.98 (s, 3H), 2.49-2.34 (m, 2H)

Example 58 8,8-Difluoro-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine trifluoroacetic acidsalt MS: 326.1 ¹H NMR (400 MHz, CD₃OD) δ ppm 4.34-4.29 (m, 4H),3.47-3.42 (m, 4H), 3.25 (t, J = 13.9 Hz, 2H), 3.18 (t, J = 6.6 Hz, 2H),2.49-2.34 (m, 2H)

Example 598,8-Difluoro-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminetrifluoroacetic acid salt

MS: 340.2. ¹H NMR (400 MHz, CD₃OD) δ ppm 4.28-3.90 (m, 5H), 3.28-3.14(m, 4H), 2.82 (s, 3H), 2.72-2.54 (m, 1H), 2.53-2.32 (m, 3H).

Example 604-(3,8-Diaza-bicyclo[3.2.1]oct-3-yl)-8-methoxy-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylaminehydrochloride

MS: 346.2. ¹H NMR (300 MHz, DMSO-d6): δ 13.70 (br s, 1H), 10.20 (br s,1H), 9.80 (br s, 1H), 4.70-4.40 (m, 2H), 4.30 (br s, 2H), 4.00-3.70 (m,3H), 3.70-3.50 (m, 2H), 3.00-2.80 (m, 3H), 3.80-2.60 (m, 1H), 2.10-1.90(m, 4H), 2.85-2.70 (m, 2H).

Example 618-tert-Butyl-4-(4-methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine(free amine)

MS: 360.2. ¹H NMR (300 MHz, CDCl₃): δ 4.86 (br s, 2H), 4.00-3.85 (m,4H), 3.00-2.70 (m, 3H), 2.60-2.50 (m, 4H), 2.50-2.30 (m, 4H), 2.10-2.05(m, 1H), 1.60-1.40 (m, 2H), 1.03 (s, 9H).

Example 624-[1,4]Diazepan-1-yl-8-trifluoromethyl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylaminehydrochloride

MS: 372.1. ¹H NMR (300 MHz, DMSO-d6): δ 13.53 (br s, 1H), 9.56 (br s,1H), 4.20-4.00 (m, 2H), 3.73-3.65 (m, 6H), 3.45-3.36 (m, 3H), 3.20-3.95(m, 2H), 2.66-2.62 (m, 1H), 2.55-2.50 (m, 2H), 1.84-1.73 (m, 1H).

Example 634-(3(S)-Amino-pyrrolidin-1-yl)-8-tert-butyl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylaminehydrochloride

MS: 346.2. ¹H NMR (300 MHz, DMSO-d6): δ 13.52-13-47 (m, 1H), 8.71 (br s,3H), 6.65-6.25 (m, 2H), 4.25-3.91 (m, 5H), 3.20-3.07 (m, 1H), 3.02-2.75(m, 2H), 2.47-2.15 (m, 4H), 2.55-2.50 (m, 2H), 1.51-1.36 (m, 1H), 0.98(s, 9H).

Example 644-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 314.2. ¹H NMR (500 MHz, CD₃OD): δ 4.98-4.84 (m, 2H), 4.31-4.26 (m,2H), 3.99-3.51 (m, 2H), 2.94-2.65 (m, 3H), 2.25-2.15 (m, 3H), 2.10-1.94(m, 4H), 1.70-1.58 (m, 1H), 1.17 (d, J=6.7, 3H).

Example 658-tert-Butyl-4-(3,8-diazabicyclo[3.2.1]oct-3-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 372.5. ¹H NMR (500 MHz, CD₃OD): δ 4.86-4.79 (m, 2H), 4.31 (s, 2H),3.78-3.66 (m, 2H), 3.12-3.03 (m, 1H), 2.95-2.82 (m, 2H), 2.43-2.34 (m,1H), 2.29-2.15 (m, 3H), 2.09-2.00 (m, 2H), 1.67-1.59 (m, 1H), 1.57-1.48(m, 1H), 1.05 (s, 9H).

Example 668-Methoxy-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine

MS: 334.2. ¹H NMR (500 MHz, CD₃OD): δ 4.00-3.86 (m, 4H), 3.86-3.76 (m,1H), 3.44 (s, 3H), 3.05-2.89 (m, 2H), 2.88-2.76 (m, 1H), 2.67 (dd,J=16.7, 5.8, 1H), 2.60-2.50 (m, 4H), 2.35 (s, 3H), 2.20-1.98 (m, 2H).

Example 674-[3-(Aminomethyl)azetidin-1-yl]-8-tert-butyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 346.2. ¹H NMR (500 MHz, CD₃OD): δ 4.82-4.68 (m, 1H), 4.62-4.49 (m,1H), 4.47-4.39 (m, 1H), 4.17 (s, 1H), 3.29-3.14 (m, 2H), 3.13-2.97 (m,1H), 2.94-2.77 (m, 2H), 2.44-2.28 (m, 1H), 2.28-2.15 (m, 1H), 1.71-1.40(m, 2H), 1.39-1.22 (m, 1H), 1.04 (s, 9H).

Example 684-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 330.2. ¹H NMR (500 MHz, CD₃OD): δ 4.85-4.74 (m, 2H), 4.31 (s, 2H),3.79-3.61 (m, 2H), 3.09-2.89 (m, 2H), 2.88-2.77 (m, 1H), 2.35-2.12 (m,3H), 2.13-1.92 (m, 4H), 1.66-1.50 (m, 1H), 1.19 (d, J=6.6, 3H).

Example 694-[(3R)-3-Aminopyrrolidin-1-yl]-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 320.2. ¹H NMR (500 MHz, CD₃OD): δ 4.25-3.99 (m, 4H), 3.97-3.85 (m,1H), 3.45 (s, 3H), 3.41-3.36 (m, 1H), 3.12-3.00 (m, 1H), 2.99-2.88 (m,2H), 2.81-2.69 (m, 1H), 2.67-2.49 (m, 1H), 2.41-2.24 (m, 1H), 2.22-2.03(m, 2H).

Example 704-piperazin-1-yl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 342.1. ¹H NMR (300 MHz, DMSO-d6): δ 13.8 (br s, 1H), 9.84 (s, 2H),7.67 (br s, 2H), 4.22 (br s, 4H), 3.50 (br s, 2H), 3.16 (br s, 2H),2.96-2.90 (br m, 4H), 2.58 (m, 1H), 2.25 (m, 1H), 1.87-1.80 (m, 1H).

Example 714-(4-Methylpiperazin-1-yl)-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine

MS: 356.1. ¹H NMR (300 MHz, CDCl₃): δ 4.57 (s, 2H), 3.93 (m, 4H),2.98-2.91 (m, 2H), 2.85-2.74 (m, 2H), 2.61-2.56 (m, 2H), 2.50-2.47 (m,4H), 2.33 (s, 3H), 1.94-1.82 (m, 1H).

Example 728-tert-Butyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine

MS: 344.1. ¹H NMR (300 MHz, CDCl₃): δ 4.80 (br s, 2H), 3.97 (br s, 4H),2.77-2.66 (m, 2H), 2.57-2.52 (m, 4H), 2.36 (s, 3H), 2.36-2.30 (m, 2H),2.25-2.15 (m, 1H), 1.52-1.47 (m, 2H), 0.97 (s, 9H).

Example 738-Methyl-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 288.1. ¹H NMR (300 MHz, DMSO-d6): δ 13.63 (br s, 1H), 9.72 (br s,2H), 7.63 (br s, 2H), 4.20 (br s, 4H), 3.27 (br s, 4H), 2.68-2.62 (m,2H), 2.49-2.43 (m, 1H), 2.13-2.10 (m, 1H), 1.95-1.90 (m, 2H), 1.52-1.48(m, 1H), 1.05 (d, J=6.0, 3H).

Example 748-Methyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine

MS: 302.1 [M+H]⁺. ¹H NMR (300 MHz, CDCl₃): δ 4.55 (s, 2H), 3.94-3.91 (m,4H), 2.74-2.67 (m, 3H), 2.50-2.47 (m, 4H), 2.17-2.11 (m, 1H), 2.11-1.93(m, 2H), 1.59-1.52 (m, 1H), 1.08 (d, J=6.2, 3H).

Example 756,6-Dimethyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine

MS: 332.1 [M+H]⁺. ¹H NMR (300 MHz, CDCl₃): δ 4.68 (br s, 2H), 3.92-3.88(m, 4H), 2.67-2.63 (m, 2H), 2.52-2.48 (m, 4H), 1.89-1.85 (m, 2H),1.76-1.72 (m, 2H), 1.34 (s, 6H).

Example 764-(1,4-Diazepan-1-yl)-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 334.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.41 (br s, 1H), 9.34(br s, 2H), 8.0-7.9 (br s, 2H), 4.16 (br s, 2H), 4.03 (br s, 2H), 3.82(br s, 1H), 3.31 (s, 3H), 3.24 (br s, 3H), 2.92-2.88 (m, 3H), 2.74-2.69(m, 1H), 2.17 (br s, 2H), 2.00 (br s, 2H).

Example 778-tert-Butyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 344.1 [M+H]⁺. ¹H NMR (300 MHz, CDCl₃): δ 5.20 (br s, 2H), 3.93 (brs, 3H), 3.84 (br s, 1H), 3.69-3.63 (m, 1H), 3.44-3.37 (m, 1H), 2.77-2.62(m, 3H), 2.51 (s, 3H), 2.33-2.11 (m, 3H), 1.96-1.89 (m, 1H), 1.51-1.44(m, 2H), 0.97 (s, 9H).

Example 784-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 355.2 [M+H]⁺. ¹H NMR (300 MHz, CD₃OD): δ 3.96 (br s, 2H), 3.83 (brs, 1H), 3.64 (br s, 1H), 3.39-3.33 (m, 1H), 2.97-2.86 (m, 3H), 2.69-2.55(m, 2H), 2.47 (s, 3H), 2.37-2.23 (m, 2H), 1.95-1.89 (m, 2H).

Example 794-[(3S)-3-Aminopyrrolidin-1-yl]-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 320.3 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.45 (br s, 1H), 8.66(s, 3H), 7.82 (br s, 2H), 4.21-3.81 (m, 6H), 3.49 (s, 3H), 2.92-2.88 (m,3H), 2.73-2.68 (m, 1H), 2.50-2.43 (m, 2H), 2.01-1.91 (m, 2H).

Example 808-Methoxy-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 334.1 [M+H]⁺. ¹H NMR (300 MHz, CDCl₃): δ 5.21 (br s, 2H), 3.92-3.85(m, 2H), 3.82-3.74 (m, 2H), 3.66-3.61 (m, 1H), 3.42-3.37 (m, 1H), 3.41(s, 3H), 3.05-2.97 (m, 1H), 2.93-2.89 (m, 1H), 2.83-2.72 (m, 2H), 2.48(s, 3H), 2.21-2.15 (m, 1H), 2.05-2.01 (m, 2H), 1.94-1.88 (m, 1H).

Example 814-[(3R)-3-Aminopyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 358.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.40 (br s, 1H), 8.68(s, 3H), 8.2-7.8 (br s, 2H), 4.22-4.18 (m, 1H), 4.05-3.80 (m, 4H),3.06-2.93 (m, 3H), 2.63-2.50 (m, 2H), 2.32-2.20 (m, 3H), 1.80-1.74 (m,1H).

Example 824-[(3R)-3-Aminopyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 342.1 [M+H]⁺. ¹H NMR (300 MHz, CD₃OD): δ 4.41-4.00 (br m, 5H),3.30-2.95 (m, 3H), 2.88-2.65 (m, 3H), 2.53-2.25 (m, 2H), 2.02-1.97 (m,1H).

Example 834-[(3S)-3-Aminopyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 342.1 [M+H]⁺. ¹H NMR (300 MHz, CD₃OD): δ 4.41-4.00 (br m, 5H),3.30-2.95 (m, 3H), 2.88-2.65 (m, 3H), 2.53-2.25 (m, 2H), 2.02-1.97 (m,1H).

Example 844-[(3R)-3-Aminopyrrolidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 304.2 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 12.99 (br s, 1H), 8.45(s, 3H), 4.10-3.90 (m, 4H), 2.94-2.80 (m, 3H), 2.27-2.12 (m, 3H),1.96-1.90 (m, 2H), 1.60-1.50 (m, 1H), 1.08 (d, J=6.3, 3H).

Example 854-[(3S)-3-Aminopyrrolidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 304.2 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.05 (br s, 1H), 8.54(s, 3H), 4.05-3.90 (m, 4H), 2.94-2.80 (m, 3H), 2.27-2.12 (m, 3H),1.96-1.90 (m, 2H), 1.60-1.50 (m, 1H), 1.08 (d, J=6.3, 3H).

Example 864-[3-(Aminomethyl)azetidin-1-yl]-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 320.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.26 (br s, 1H), 8.25(s, 3H), 7.90 (br s, 2H), 4.77 (br s, 2H), 4.62-4.57 (m, 1H), 4.39-4.30(m, 2H), 4.13-4.10 (m, 1H), 3.80 (s, 1H), 3.20-3.15 (m, 1H), 3.17 (s,3H), 2.90-2.85 (m, 2H), 2.72-2.65 (m, 1H), 2.01-1.98 (m, 2H).

Example 874-[(3S)-3-Aminopyrrolidin-1-yl]-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 302.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.09 (br s, 1H), 8.41(br s, 3H), 7.52 (br s, 2H), 4.10-3.95 (m, 6H), 2.15-2.05 (m, 2H),1.82-1.75 (m, 4H), 1.31 (s, 6H).

Example 884-[(3R)-3-Aminopyrrolidin-1-yl]-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 302.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.09 (br s, 1H), 8.41(br s, 3H), 7.52 (br s, 2H), 4.10-3.95 (m, 6H), 2.15-2.05 (m, 2H),1.82-1.75 (m, 4H), 1.31 (s, 6H).

Example 896,6-Dimethyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 316.2 [M+H]⁺. ¹H NMR (300 MHz, CDCl₃): δ 6.1 (br s, 1H), 4.05-3.90(m, 4H), 3.50 (br s, 2H), 2.66-2.62 (m, 2H), 2.54 (s, 3H), 2.30-2.10 (m,3H), 1.82-1.73 (m, 4H), 1.28 (s, 6H).

Example 904-[3-(Aminomethyl)azetidin-1-yl]-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 302.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.05 (br s, 1H), 8.16(br s, 3H), 7.52 (br s, 2H), 4.64-4.13 (m, 4H), 3.18 (s, 3H), 1.79-1.73(m, 4H), 1.28 (s, 6H).

Example 916,6-Dimethyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine

MS: 358.1 [M+H]⁺. ¹H NMR (300 MHz, CD₃OD): δ 4.25-4.17 (br m, 5H), 3.40(br m, 3H), 3.03 (s, 3H), 2.69 (t, J=6.3, 2H), 2.06-2.02 (m, 3H),1.89-1.85 (m, 2H), 1.47 (s, 6H).

Example 928-tert-Butyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine

MS: 386.1 [M+H]⁺. ¹H NMR (300 MHz, CD₃OD): δ 4.25-4.00 (br m, 4H),3.90-3.85 (br m, 1H), 3.54-3.35 (m, 4H), 3.13-3.01 (m, 5H), 2.91-2.85(m, 2H), 2.44-2.26 (m, 2H), 1.68-1.52 (m, 2H), 1.08 (s, 9H).

Example 934-[(3aR,6aS)-5-Methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine

MS: 398.1 [M+H]⁺. ¹H NMR (300 MHz, CD₃OD): δ 4.25-4.00 (br m, 4H),3.90-3.85 (br m, 1H), 3.54-3.40 (m, 4H), 3.21-3.01 (m, 7H), 2.91-2.68(m, 2H), 2.43-2.39 (m, 1H), 1.97-1.89 (m, 1H).

Example 948-Methyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine

MS: 344.1 [M+H]⁺. ¹H NMR (300 MHz, CD₃OD): δ 4.25-4.00 (br m, 4H),3.90-3.85 (br m, 1H), 3.51-3.40 (m, 4H), 3.22-3.12 (m, 1H), 3.04-3.01(m, 3H), 2.89-2.83 (m, 2H), 2.29-2.20 (m, 1H), 2.13-2.03 (m, 2H),1.66-1.58 (m, 2H), 1.21 (d, J=6.3, 3H).

Example 958-tert-Butyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine

MS: 370.2 [M+H]⁺. ¹H NMR (300 MHz, CDCl₃): δ 4.70 (br s, 2H), 3.92-3.86(m, 2H), 3.76-3.73 (m, 2H), 2.96 (br s, 2H), 2.79-2.65 (m, 5H),2.46-2.42 (m, 2H), 2.33 (s, 3H), 2.33-2.30 (m, 1H), 2.10-2.04 (m, 1H),1.48-1.44 (m, 2H), 0.96 (s, 9H).

Example 968-Methoxy-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine

MS: 360.1 [M+H]⁺. ¹H NMR (300 MHz, CD₃OD): δ 4.22-4.00 (br m, 5H),3.90-3.85 (br m, 1H), 3.54-3.35 (m, 5H), 3.39 (s, 3H), 3.15-2.90 (m,6H), 2.75-2.70 (m, 1H), 2.14 (br s, 2H).

Example 974-[(3aR,6aS)-5-Methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine

MS: 382.1 [M+H]⁺. ¹H NMR (300 MHz, CDCl₃): δ 4.66 (br s, 2H), 3.89-3.8(m, 2H), 3.76-3.72 (m, 2H), 2.98-2.95 (m, 3H), 2.79-2.75 (m, 3H),2.66-2.58 (m, 1H), 2.47-2.43 (m, 3H), 2.35 (s, 3H), 2.33-2.30 (m, 2H),1.91-1.88 (m, 1H).

Example 988-Methyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine

MS: 328.2 [M+H]⁺. ¹H NMR (300 MHz, CDCl₃): δ 4.66 (br s, 2H), 3.92-3.86(m, 2H), 3.76-3.72 (m, 2H), 2.94 (br s, 2H), 2.78-2.68 (m, 5H),2.43-2.40 (m, 2H), 2.33 (s, 3H), 2.18-2.14 (m, 1H), 2.00-1.90 (m, 2H),1.60-1.50 (m, 1H), 1.09 (d, J=6.3, 3H).

Example 994-(1,4-Diazepan-1-yl)-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 316.3 [M+H]⁺. ¹H NMR (300 MHz, CD₃OD): δ 4.44-4.40 (br m, 1H),4.30-4.24 (m, 2H), 4.14-4.10 (m, 1H), 3.65 (s, 2H), 3.60-3.45 (m, 6H),2.62-2.58 (m, 2H), 2.33-2.26 (m, 3H), 1.95-1.92 (m, 2H), 1.84-1.80 (m,2H), 1.37 (s, 6H).

Example 1006,6-Dimethyl-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 302.3 [M+H]⁺. ¹H NMR (300 MHz, CD₃OD): δ 4.41-4.38 (br m, 3H),3.60-3.45 (m, 11H), 2.62-2.58 (m, 2H), 1.93-1.91 (m, 2H), 1.84-1.80 (m,2H), 1.38 (s, 6H).

Example 1016,6-Dimethyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine

MS: 316.2 [M+H]⁺. ¹H NMR (300 MHz, CDCl₃): δ 4.80 (br s, 2H), 3.92-3.88(m, 4H), 2.67-2.52 (m, 6H), 1.82-1.80 (m, 2H), 1.74-1.72 (m, 2H), 1.29(s, 6H).

Example 102N⁴-(2-Aminoethyl)-N⁴,6,6-trimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diaminehydrochloride

MS: 306.2 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.10-13.00 (br s, 1H),8.02 (br s, 3H), 7.70-7.65 (br s, 2H), 3.96 (br s, 2H), 3.50 (br s, 3H),3.18-3.14 (m, 2H), 1.79-1.72 (m, 4H), 1.29 (s, 6H).

Example 103N⁴-(2-Aminoethyl)-N⁴,6,6-trimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diaminehydrochloride

MS: 290.2 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.10-13.00 (br s, 1H),8.02 (br s, 3H), 7.70-7.65 (br s, 2H), 3.96 (br s, 2H), 3.50 (br s, 3H),3.18-3.14 (m, 2H), 1.79-1.72 (m, 4H), 1.29 (s, 6H).

Example 104N⁴-(2-Aminoethyl)-8-methoxy-N⁴-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diaminehydrochloride

MS: 308.2 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.10-13.00 (br s, 1H),8.04 (br s, 3H), 7.90-7.70 (br s, 2H), 3.97-3.81 (m, 4H), 3.48-3.30 (m,7H), 2.92-2.88 (m, 3H), 2.73-2.64 (m, 1H), 2.00-1.98 (m, 2H).

Example 105N⁴-(2-Aminoethyl)-8-methoxy-N⁴-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diaminehydrochloride

MS: 292.2 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.10-13.00 (br s, 1H),8.07 (br s, 3H), 7.55-7.45 (br s, 2H), 3.97-3.81 (m, 4H), 3.30 (s, 3H),3.30-3.10 (m, 4H), 2.77-2.63 (m, 3H), 2.05-1.98 (m, 2H).

Example 106N⁴-(2-Aminoethyl)-8-tert-butyl-N⁴-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diaminehydrochloride

MS: 334.2 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.10-13.00 (br s, 1H),8.08 (br s, 3H), 7.70-7.55 (br s, 2H), 3.96 (s, 2H), 3.48 (s, 3H),3.18-2.86 (m, 5H), 2.26-2.09 (m, 2H), 1.60-1.50 (m, 2H), 0.97 (s, 9H).

Example 107N⁴-(2-Aminoethyl)-8-tert-butyl-N⁴-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diaminehydrochloride

MS: 318.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.10-13.00 (br s, 1H),8.10 (br s, 3H), 7.50-7.45 (br s, 2H), 3.96 (br m, 2H), 3.48 (s, 3H),2.83-2.63 (m, 5H), 2.25-2.10 (m, 2H), 1.46-1.43 (m, 2H), 0.95 (s, 9H).

Example 108N⁴-(2-Aminoethyl)-N⁴-methyl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diaminehydrochloride

MS: 346.2 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.10-13.00 (br s, 1H),8.15 (br s, 3H), 7.90-7.70 (br s, 2H), 3.98 (s, 2H), 3.49 (s, 3H),3.18-2.91 (m, 6H), 2.64-2.55 (m, 1H), 2.25-2.09 (m, 1H), 1.80-1.76 (m,1H).

Example 109N⁴-(2-Aminoethyl)-N⁴-methyl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diaminehydrochloride

MS: 330.2 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.43 (s, 1H), 8.19 (brs, 3H), 7.59 (br s, 2H), 3.92 (br s, 2H), 3.46 (s, 3H), 3.15-3.13 (m,2H), 2.92-2.88 (m, 4H), 2.58-2.55 (m, 1H), 2.25-2.20 (m, 1H), 1.81-1.77(m, 1H).

Example 110N⁴-(2-Aminoethyl)-N⁴,8-dimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diaminehydrochloride

MS: 292.2 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.10-13.00 (br s, 1H),8.08 (br s, 3H), 7.90-7.70 (br s, 2H), 3.96 (s, 2H), 3.48 (s, 3H),3.17-2.80 (m, 5H), 2.27-2.17 (m, 1H), 1.95-1.90 (m, 2H), 1.48-1.45 (m,1H), 1.09 (d, J=6.3, 3H).

Example 111N⁴-(2-Aminoethyl)-N⁴,8-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diaminehydrochloride

MS: 276.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6): δ 13.20 (s, 1H), 8.05 (brs, 3H), 7.50-7.48 (br s, 2H), 3.89 (m, 2H), 3.48 (s, 3H), 3.17-2.80 (m,5H), 2.27-2.17 (m, 1H), 1.95-1.90 (m, 2H), 1.48-1.45 (m, 1H), 1.07 (d,J=6.3, 3H).

Example 1128,8-Difluoro-4-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminetrifluoroacetate

MS: 340.1 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.14 (br m, 4H), 4.01 (brm, 1H), 3.20 (m, 4H), 2.82 (s, 3H), 2.63 (m, 1H), 2.41 (m, 3H).

Example 1134-[(3R)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 326.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.15 (m, 5H), 3.20 (m, 4H),2.57 (m, 1H), 2.41 (m, 2H), 2.32 (m, 1H).

Example 1144-(1,4-Diazepan-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminetrifluoroacetate

MS: 340.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.31 (m, 2H), 4.18 (m, 2H),3.62 (m, 2H), 3.40 (m, 2H), 3.25 (m, 2H), 3.18 (m, 2H), 2.39 (m, 2H),2.28 (m, 2H).

Example 115N⁴-(2-Aminoethyl)-8,8-difluoro-N⁴-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diaminetrifluoroacetate

MS: 314.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.12 (m, 2H), 3.61 (s, 3H),3.34 (m, 2H), 3.26 (m, 2H), 3.18 (m, 2H), 2.41 (m, 2H).

Example 1168,8-Difluoro-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 324.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.48-3.87 (m, 5H), 3.17 (m,2H), 3.40 (m, 2H), 2.82 (s, 3H), 2.65-2.22 (m, 4H).

Example 1174-[(3R)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 310.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.41-3.93 (m, 5H), 3.18 (m,2H), 3.14 (m, 2H), 2.59 (m, 1H), 2.45 (m, 2H), 2.28 (m, 1H).

Example 1188,8-Difluoro-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 310.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.38 (m br, 4H), 3.44 (m,4H), 3.19 (m, 2H), 3.05 (m, 2H), 2.44 (m, 2H).

Example 1194-[(3S)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 326.1 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.13 (m, 5H), 3.18 (m, 2H),3.14 (m, 2H), 2.56 (m, 1H), 2.39 (m, 2H), 2.28 (m, 1H).

Example 1204-(3-Aminoazetidin-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine(free amine)

MS: 312.1 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.53 (m, 2H), 4.02 (m, 3H),3.09 (m, 2H), 3.03 (m, 2H), 2.35 (m, 2H).

Example 1218,8-Difluoro-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine(free amine)

MS: 366.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 3.97 (m, 2H), 3.77 (m, 2H),3.08 (m, 6H), 2.80 (m, 2H), 2.53 (m, 2H), 2.35 (m, 5H).

Example 1228,8-Difluoro-4-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminetrifluoroacetate

MS: 324.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.37 (m, 0.5H), 4.25 (m,1H), 4.19 (m, 0.5H), 4.08 (m, 1.5H), 3.99 (m, 1H), 3.85 (m, 0.5H), 3.16(m, 2H), 3.02 (m, 2H), 2.81 (m, 3H), 2.62 (m, 0.5H), 2.43 (m, 3H), 2.29(m, 0.5H).

Example 1238,8-Difluoro-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminetrifluoroacetate

MS: 324.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.95 (m br, 4H), 3.50 (mbr, 4H), 3.17 (m, 2H), 3.04 (m, 2H), 2.98 (s, 3H), 2.43 (m, 2H).

Example 1244-((R,R)-octahydropyrrolo[3,4-b]pyridin-6-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminetrifluoroacetate

MS: 350.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.40 (m, 0.4H), 4.29 (m,1H), 4.21 (m, 0.6H), 4.03 (m, 2.6H), 3.73 (m, 0.4H), 3.41 (m, 1H), 3.16(m, 2H), 3.02 (m, 3.6H), 2.81 (m, 0.4H), 2.43 (m, 2H), 1.90 (m, 4H).

Example 125N⁴-(2-Aminoethyl)-8,8-difluoro-N⁴-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine(free amine)

MS: 298.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.21 (br m, 0.4H), 4.07 (m,1.6H), 3.60 (s, 3H), 3.35 (m, 2H), 3.18 (m, 2H), 3.05 (m, 2H), 2.45 (m,2H).

Example 1264-[(3S)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 310.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.41-3.93 (m, 5H), 3.11 (m,2H), 3.08 (m, 2H), 2.57 (m, 0.6H), 2.42 (m, 2.4H), 2.33 (m, 0.6H), 2.20(m, 0.4H).

Example 1274-(3-Aminoazetidin-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 296.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.98 (m, 1H), 4.68 (m, 2H),4.37 (m, 2H), 3.18 (m, 2H), 3.02 (m, 2H), 2.47 (m, 2H).

Example 128N⁴-(2-Aminoethyl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diaminehydrochloride

MS: 300.1 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 3.63 (m, 2H), 3.12 (m, 2H),3.03 (m, 2H), 2.94 (m, 2H), 2.34 (m, 2H).

Example 1298,8-Difluoro-4-[(3aR,6aS)-hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine(free amine)

MS: 352.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.00 (m, 2H), 3.72 (m, 2H),3.18-2.97 (m, 8H), 2.80 (m, 2H), 2.33 (m, 2H).

Example 1304-(1,4-Diazepan-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine(free amine)

MS: 324.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 3.96 (m, 4H), 3.05 (m, 4H),2.88 (m, 4H), 2.38 (m, 2H), 1.96 (m, 2H).

Example 1318,8-Dimethyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminetrifluoroacetate

MS: 332.3 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.60-4.21 (br m, 4H), 3.49(m, 4H), 2.96 (m, 5H), 2.46 (s, 2H), 1.75 (m, 2H), 1.08 (s, 6H).

Example 1324-(1,4-Diazepan-1-yl)-8,8-dimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminetrifluoroacetate

MS: 332.3 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.29 (m, 2H), 4.16 (m, 2H),3.51 (m, 2H), 3.40 (m, 2H), 2.94 (m, 2H), 2.45 (s, 2H), 2.32 (m, 2H),1.74 (m, 2H), 1.07 (s, 6H).

Example 133N⁴-(2-Aminoethyl)-N⁴,8,8-trimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diaminetrifluoroacetate

MS: 306.3 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 3.92 (m, 2H), 3.33 (m, 2H),2.97 (m, 2H), 2.77 (s, 3H), 2.45 (s, 2H), 1.74 (m, 2H), 1.07 (s, 6H).

Example 1348,8-Dimethyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 332.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.62-3.93 (br m, 5H), 2.95(m, 2H), 2.82 (s, 3H), 2.75-2.47 (br m, 2H), 2.45 (s, 2H), 1.73 (m, 2H),1.07 (s, 6H).

Example 1358,8-Dimethyl-4-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 332.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.09 (m, 2H), 3.97 (m, 2H),3.82 (m, 1H), 2.88 (m, 2H), 2.70 (s, 3H), 2.47 (m, 1H), 2.43 (s, 2H),2.26 (m, 1H), 1.71 (m, 2H), 1.05 (s, 6H).

Example 1364-[(3R)-3-Aminopyrrolidin-1-yl]-8,8-dimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 318.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.47-3.98 (br m, 5H), 2.95(m, 2H), 2.63 (m, 1H), 2.46 (s, 2H), 2.44-2.18 (m, 1H), 1.74 (m, 2H),1.07 (s, 6H).

Example 1378,8-Dimethyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 316.3 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.48-3.85 (br m, 5H), 2.80(m, 5H), 2.63-2.20 (br m, 2H), 2.39 (s, 2H), 1.75 (m, 2H), 1.07 (s, 6H).

Example 1384-(4-Methylpiperazin-1-yl)-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 372.1 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 3.93 (m, 4H), 3.00 (m, 3H),2.64 (m, 2H), 2.56 (m, 4H), 2.35 (s, 3H), 2.30 (m, 1H), 1.83 (m, 1H).

Example 1394-[(3R)-3-Aminopyrrolidin-1-yl]-8-tert-butyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 346.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.12 (m, 5H), 3.06 (m, 1H),3.87 (m, 2H), 2.60 (br m, 1H), 2.40-2.19 (m, 3H), 1.52 (m, 2H), 1.05 (s,9H).

Example 1408-Methyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 302.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.91 (m, 2H), 3.77 (m, 1H),3.66 (m, 1H), 3.46 (m, 1H), 2.65 (m, 3H), 2.47 (s, 3H), 2.23 (m, 1H),2.04 (m, 1H), 1.93 (m, 2H), 1.83 (m, 1H), 1.51 (m, 1H), 1.08 (m, 3H).

Example 1414-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 372.1 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.00 (m, 2H), 3.87 (m, 1H),3.72 (m, 1H), 3.53 (m, 1H), 2.98 (m, 3H), 2.61 (m, 2H), 2.53 (s, 3H),2.32 (m, 2H), 2.04 (m, 1H), 1.84 (m, 1H).

Example 1428-tert-Butyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 360.2 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.15 (m, 5H), 3.08 (m, 1H),2.89 (m, 2H), 2.82 (s, 3H), 2.60 (m, 1H), 2.39 (m, 2H), 2.23 (m, 1H),1.55 (m, 2H), 1.03 (m, 9H).

Example 1434-[3-(Aminomethyl)azetidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 304.1 [M+H]⁺. ¹H NMR (400 MHz, CD₃OD): δ 4.50 (m, 2H), 4.16 (m, 2H),3.37 (m, 2H), 3.23 (m, 1H), 2.95 (m, 2H), 2.82 (m, 1H), 2.20 (m, 1H),2.03 (m, 2H), 1.55 (m, 1H), 1.14 (m, 3H).

Example 1444-[(3R)-3-Aminopyrrolidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 288.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6) δ 13.22 (br s, 1H), 8.45 (s,3H), 7.60 (br s, 1H), 4.15-3.90 (m, 4H), 2.94-2.80 (m, 3H), 2.27-2.12(m, 3H), 1.96-1.90 (m, 2H), 1.57-1.50 (m, 1H), 1.07 (d, J=6.3, 3H).

Example 1454-(1,4-Diazepan-1-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 302.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6) δ 13.20 (br s, 1H), 9.18 (brs, 2H), 7.60 (br s, 2H), 4.16-3.95 (m, 3H), 3.75-3.20 (m, 7H), 2.95-2.80(m, 3H), 2.20-2.00 (m, 3H), 1.99-1.82 (m, 2H), 1.53 (m, 1H), 1.07 (d,J=6.3, 3H).

Example 1468-Methyl-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 304.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6) δ 13.51 (br s, 1H), 9.34 (s,2H), 8.10-7.80 (br s, 1H), 4.22 (br s, 4H), 3.42-3.32 (m, 4H), 2.94-2.90(m, 3H), 2.20 (m, 1H), 1.95 (m, 2H), 1.59-1.49 (m, 2H), 1.10 (d, J=6.3,3H).

Example 1474-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 384.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6) δ 13.62 (br s, 1H), 10.14(br s, 1H), 9.87 (br s, 1H), 8.1-7.8 (br, 1H), 4.51 (br s, 2H), 4.25 (m,2H), 3.98-3.50 (m, 2H), 3.10-2.91 (m, 4H), 2.64-2.59 (m, 1H), 2.25-2.20(m, 1H), 2.00-1.85 (m, 5H).

Example 1484-piperazin-1-yl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 358.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6) δ 13.64 (br s, 1H), 9.81 (s,2H), 7.67 (br s, 2H), 4.22 (br s, 4H), 3.50 (br s, 2H), 3.16 (br s, 2H),2.96-2.90 (br m, 4H), 2.58 (m, 1H), 2.25 (m, 1H), 1.81-1.75 (m, 1H).

Example 1494-(1,4-Diazepan-1-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 318.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6) δ 13.08 (br s, 1H), 9.21 (brs, 2H), 7.60 (br s, 2H), 4.18-3.99 (m, 3H), 3.75-3.20 (m, 6H), 3.01-2.80(m, 3H), 2.20-2.05 (m, 3H), 1.99-1.82 (m, 2H), 1.53 (m, 1H), 1.12 (d,J=6.3, 3H).

Example 1508-Methoxy-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-aminehydrochloride

MS: 320.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6) δ 13.74 (s, 1H), 9.88 (s,2H), 4.22 (s, 2H), 3.73 (m, 1H), 3.33 (s, 3H), 2.92-2.72 (m, 2H), 2.04(m, 2H).

Example 1514-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-aminehydrochloride

MS: 328.1 [M+H]⁺. ¹H NMR (300 MHz, DMSO-d6) δ 13.8 (br s, 1H), 9.98 (brs, 1H), 9.59 (br s, 1H), 7.50 (br s, 1H), 4.62-4.57 (m, 2H), 3.73 (s,2H), 3.50-3.40 (br m, 2H), 2.03-2.00 (m, 2H), 1.79-1.70 (m, 6H), 1.50(s, 6H).

Biological Methods: Binding Assay on Recombinant Human Histamine H₄Receptor.

SK-N-MC cells or COS7 cells were transiently transfected with pH4R andgrown in 150 cm² tissue culture dishes. Cells were washed with salinesolution, scraped with a cell scraper and collected by centrifugation(1000 rpm, 5 min). Cell membranes were prepared by homogenization of thecell pellet in 20 mM Tris-HCl with a polytron tissue homogenizer for 10sec at high speed. Homogenate was centrifuged at 1000 rpm for 5 min at4° C. The supernatant was then collected and centrifuged at 20,000×g for25 min at 4° C. The final pellet was resuspended in 50 mM Tris-HCl. Cellmembranes were incubated with ³H-histamine (5-70 nM) in the presence orabsence of excess histamine (10,000 nM). Incubation occurred at roomtemperature for 45 min. Membranes were harvested by rapid filtrationover Whatman GF/C filters and washed 4 times with ice-cold 50 mM TrisHCl. Filters were then dried, mixed with scintillant and counted forradioactivity. SK-N-MC or COS7 cells expressing human histamine H₄receptor were used to measure the affinity of binding of other compoundsand their ability to displace ³H-ligand binding by incubating theabove-described reaction in the presence of various concentrations ofinhibitor or compound to be tested. For competition binding studiesusing ³H-histamine, K values were calculated, based on an experimentallydetermined K_(D) value of 5 nM and a ligand concentration of 5 nM,according to Y.-C. Cheng and W. H. Prusoff (Biochem. Pharmacol. 1973,22(23):3099-3108): K_(i)=(IC₅₀)/(1+([L]/(K_(D))). Results for thecompounds tested in this assay are presented in Table 1 as an average ofresults obtained.

TABLE 1 Ex. K_(i) (μM) 1 0.503 2 0.013 3 0.023 4 0.021 5 0.008 6 0.005 70.003 8 0.053 9 0.110 10 0.132 11 0.454 12 0.182 13 0.574 14 1.050 150.286 16 0.071 17 0.142 18 0.221 19 0.244 20 0.005 21 0.003 22 0.003 230.083 24 0.002 25 0.507 26 0.032 27 >10 28 0.066 30 0.145 31 0.005 320.002 33 0.390 34 0.123 35 0.417 36 >10 37 0.015 38 0.300 39 0.062 400.503 41 1.007 42 0.467 43 0.007 44 0.011 45 0.004 46 0.021 47 0.005 480.003 49 2.260 50 0.647 51 0.205 52 0.067 53 0.387 54 1.613 55 0.033 560.010 57 0.023 58 0.014 59 0.009 112 0.006 113 0.0011 114 0.0021 1150.021 116 0.00048 117 0.0068 118 0.029 119 0.021 120 0.17 121 0.15 1220.0070 123 0.015 124 0.033 125 0.15 126 0.0061 127 0.064 128 0.15 1290.68 130 0.0082 132 0.035 133 0.054 134 0.0076 135 0.035 136 0.0077 1370.018

While the invention has been illustrated by reference to examples, it isunderstood that the invention is intended not to be limited to theforegoing detailed description.

1. A chemical entity selected from the group consisting of compounds ofFormula (I), pharmaceutically acceptable salts of compounds of Formula(I), pharmaceutically acceptable prodrugs of compounds of Formula (I),and pharmaceutically active metabolites of compounds of Formula (I):

wherein X is O or S; R¹ is H, methyl, or bromo; R² is H or C₁₋₄alkyl; orR¹ and R² taken together form —(CH₂)₄₋₅— optionally substituted with oneor two substituents independently selected from C₁₋₄alkyl, C₁₋₄alkoxy,CF₃, and fluoro; —N(R³)R⁴ is one of the following moieties, wherein R³and R⁴ are taken together or separately as defined by each one of saidmoieties:

where q is 0 or 1; p is 0 or 1; r is 0 or 1; R^(a) is H or OH; R^(b) andR^(c) are each independently H or C₁₋₃alkyl; R^(d) is H or a C₁₋₃alkylgroup unsubstituted or substituted with OH or NH₂; R^(e) and R^(f) areeach methyl, or R^(e) and R^(f) taken together form a methylene orethylene bridge; and R⁵ is H or NH₂; provided that when R¹ is H and R²is H, methyl, or tert-butyl, then —N(R³)R⁴ is not 3-aminopyrrolidine,3-aminopiperidine, piperazine, or N-methylpiperazine.
 2. A chemicalentity as in claim 1, wherein X is O.
 3. A chemical entity as in claim1, wherein R¹ is H.
 4. A chemical entity as in claim 1, wherein R² is Hor tert-butyl.
 5. A chemical entity as in claim 1, wherein R¹ and R²taken together form —(CH₂)₄— optionally substituted with one or twosubstituents selected from the group of C₁₋₄alkyl, C₁₋₄alkoxy, CF₃, andfluoro.
 6. A chemical entity as in claim 1, wherein —N(R³)R⁴ is one ofthe following moieties:

where q is 0; R^(a) is H; R^(b) and R^(c) are each independently H ormethyl; and R^(d) is H or methyl.
 7. A chemical entity as in claim 1,wherein —N(R³)R⁴ is one of the following moieties:

where q is 0; R^(a) is H; R^(b) and R^(c) are each independently H ormethyl; and R^(d) is H or methyl.
 8. A chemical entity as in claim 1,wherein R⁵ is NH₂.
 9. An chemical entity selected from the groupconsisting of:4-(4-Methyl-piperazin-1-yl)thieno[3,2-d]pyrimidin-2-ylamine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-[(3aR,6aR)-Hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-2-ylamine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-2-ylamine;4-[(3aR,6aR)-Hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidine;7-Methyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]thieno[3,2-d]pyrimidin-2-amine;7-Methyl-4-(4-methylpiperazin-1-yl)thieno[3,2-d]pyrimidin-2-amine;7-Bromo-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]thieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-(4-methylpiperazin-1-yl)thieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]thieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-piperazin-1-yl)thieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6-tert-butylthieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-(octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl)thieno[3,2-d]pyrimidin-2-amine;4-[(4aR,7aR)-Octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N⁴-(2-Aminoethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N-(6,7,8,9-Tetrahydro[1]benzofuro[3,2-d]pyrimidin-4-yl)ethane-1,2-diamine;(3R)-N-Methyl-1-(6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-4-yl)pyrrolidin-3-amine;N-(6,7,8,9-Tetrahydro[1]benzothieno[3,2-d]pyrimidin-4-yl)ethane-1,2-diamine;(3R)-N-Methyl-1-(6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-4-yl)pyrrolidin-3-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(4aR,7aR)-Octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-Hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopiperidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(1S,4S)-2,5-Diazabicyclo[2.2.1]hept-2-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(1R,4R)-2,5-Diazabicyclo[2.2.1]hept-2-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;(3S,4S)-1-(2-Amino-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-4-yl)-4-(methylamino)pyrrolidin-3-ol;4-[(3R)-3-(Dimethylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Ethylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Aminomethyl)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(4aR,7aR)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(4-Methylpiperazin-1-yl)-7,8,9,10-tetrahydro-6H-cyclohepta[4,5]thieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-7,8,9,10-tetrahydro-6H-cyclohepta[4,5]thieno[3,2-d]pyrimidin-2-amine;4-[(4aR,7aR)-Octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-7,8,9,10-tetrahydro-6H-cyclohepta[4,5]thieno[3,2-d]pyrimidin-2-amine;4-[4-(2-Aminoethyl)piperazin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[4-(1-Methylethyl)piperazin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(4-Ethylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(Hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(Octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(5,6-Dihydro[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-(Methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diaza-bicyclo[3.2.1]oct-3-yl)-8-methoxy-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;8-tert-Butyl-4-(4-methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-[1,4]Diazepan-1-yl-8-trifluoromethyl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-(3(S)-Amino-pyrrolidin-1-yl)-8-tert-butyl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-(3,8-diazabicyclo[3.2.1]oct-3-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methoxy-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-8-tert-butyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-piperazin-1-yl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(4-Methylpiperazin-1-yl)-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methoxy-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3aR,6aS)-5-Methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methoxy-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3aR,6aS)-5-Methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-N4,6,6-trimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4,6,6-trimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-methoxy-N4-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-methoxy-N4-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-tert-butyl-N4-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-tert-butyl-N4-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4-methyl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4-methyl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4,8-dimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4,8-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;8,8-Difluoro-4-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-8,8-difluoro-N4-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;8,8-Difluoro-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-((R,R)-octahydropyrrolo[3,4-b]pyridin-6-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-8,8-difluoro-N4-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;8,8-Difluoro-4-[(3aR,6aS)-hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8,8-Dimethyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8,8-dimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-N4,8,8-trimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;8,8-Dimethyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Dimethyl-4-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8,8-dimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Dimethyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(4-Methylpiperazin-1-yl)-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-tert-butyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-piperazin-1-yl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methoxy-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;and pharmaceutically acceptable salts, prodrugs, and active metabolitesthereof.
 10. A pharmaceutical composition comprising an effective amountof at least one chemical entity selected from compounds of Formula (I),pharmaceutically acceptable salts of compounds of Formula (I),pharmaceutically acceptable prodrugs of compounds of Formula (I), andpharmaceutically active metabolites of compounds of Formula (I):

wherein X is O or S; R¹ is H, methyl, or bromo; R² is H or C₁₋₄alkyl; orR¹ and R² taken together form —(CH₂)₄₋₅— optionally substituted with oneor two substituents independently selected from C₁₋₄alkyl, C₁₋₄alkoxy,CF₃, and fluoro; —N(R³)R⁴ is one of the following moieties, wherein R³and R⁴ are taken together or separately as defined by each one of saidmoieties:

where q is 0 or 1; p is 0 or 1; r is 0 or 1; R^(a) is H or OH; R^(b) andR^(c) are each independently H or C₁₋₃alkyl; R^(d) is H or a C₁₋₃alkylgroup unsubstituted or substituted with OH or NH₂; R^(e) and R^(f) areeach methyl, or R^(e) and R^(f) taken together form a methylene orethylene bridge; and R⁵ is H or NH₂; provided that when R¹ is H and R²is H, methyl, or tert-butyl, then —N(R³)R⁴ is not 3-aminopyrrolidine,3-aminopiperidine, piperazine, or N-methylpiperazine.
 11. Apharmaceutical composition as in claim 10, wherein said at least onechemical entity is selected from the group consisting of:4-(4-Methyl-piperazin-1-yl)thieno[3,2-d]pyrimidin-2-ylamine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-[(3aR,6aR)-Hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-2-ylamine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-2-ylamine;4-[(3aR,6aR)-Hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidine;7-Methyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]thieno[3,2-d]pyrimidin-2-amine;7-Methyl-4-(4-methylpiperazin-1-yl)thieno[3,2-d]pyrimidin-2-amine;7-Bromo-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]thieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-(4-methylpiperazin-1-yl)thieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]thieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-piperazin-1-ylthieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6-tert-butylthieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-(octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl)thieno[3,2-d]pyrimidin-2-amine;4-[(4aR,7aR)-Octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N⁴-(2-Aminoethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N-(6,7,8,9-Tetrahydro[1]benzofuro[3,2-d]pyrimidin-4-yl)ethane-1,2-diamine;(3R)-N-Methyl-1-(6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-4-yl)pyrrolidin-3-amine;N-(6,7,8,9-Tetrahydro[1]benzothieno[3,2-d]pyrimidin-4-yl)ethane-1,2-diamine;(3R)-N-Methyl-1-(6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-4-yl)pyrrolidin-3-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(4aR,7aR)-Octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-Hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopiperidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(1S,4S)-2,5-Diazabicyclo[2.2.1]hept-2-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(1R,4R)-2,5-Diazabicyclo[2.2.1]hept-2-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;(3S,4S)-1-(2-Amino-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-4-yl)-4-(methylamino)pyrrolidin-3-ol;4-[(3R)-3-(Dimethylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Ethylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Aminomethyl)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(4aR,7aR)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(4-Methylpiperazin-1-yl)-7,8,9,10-tetrahydro-6H-cyclohepta[4,5]thieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-7,8,9,10-tetrahydro-6H-cyclohepta[4,5]thieno[3,2-d]pyrimidin-2-amine;4-[(4aR,7aR)-Octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-7,8,9,10-tetrahydro-6H-cyclohepta[4,5]thieno[3,2-d]pyrimidin-2-amine;4-[4-(2-Aminoethyl)piperazin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[4-(1-Methylethyl)piperazin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(4-Ethylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(Hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(Octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(5,6-Dihydro[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-(Methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diaza-bicyclo[3.2.1]oct-3-yl)-8-methoxy-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;8-tert-Butyl-4-(4-methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-[1,4]Diazepan-1-yl-8-trifluoromethyl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-(3(S)-Amino-pyrrolidin-1-yl)-8-tert-butyl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-(3,8-diazabicyclo[3.2.1]oct-3-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methoxy-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-8-tert-butyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-piperazin-1-yl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(4-Methylpiperazin-1-yl)-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methoxy-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3aR,6aS)-5-Methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methoxy-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3aR,6aS)-5-Methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-N4,6,6-trimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4,6,6-trimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-methoxy-N4-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-methoxy-N4-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-tert-butyl-N4-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-tert-butyl-N4-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4-methyl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4-methyl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4,8-dimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4,8-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;8,8-Difluoro-4-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-8,8-difluoro-N4-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;8,8-Difluoro-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-((R,R)-octahydropyrrolo[3,4-b]pyridin-6-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-8,8-difluoro-N4-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;8,8-Difluoro-4-[(3aR,6aS)-hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8,8-Dimethyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8,8-dimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-N4,8,8-trimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;8,8-Dimethyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Dimethyl-4-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8,8-dimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Dimethyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(4-Methylpiperazin-1-yl)-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-tert-butyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-piperazin-1-yl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methoxy-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;and pharmaceutically acceptable salts, prodrugs, and active metabolitesthereof.
 12. A method for modulating histamine H₄ receptor activity,comprising exposing histamine H₄ receptor to an effective amount of atleast one chemical entity selected from compounds of Formula (I),pharmaceutically acceptable salts of compounds of Formula (I),pharmaceutically acceptable prodrugs of compounds of Formula (I), andpharmaceutically active metabolites of compounds of Formula (I):

wherein X is O or S; R¹ is H, methyl, or bromo; R² is H or C₁₋₄alkyl; orR¹ and R² taken together form —(CH₂)₄₋₅— optionally substituted with oneor two substituents independently selected from C₁₋₄alkyl, C₁₋₄alkoxy,CF₃, and fluoro; —N(R³)R⁴ is one of the following moieties, wherein R³and R⁴ are taken together or separately as defined by each one of saidmoieties:

where q is 0 or 1; p is 0 or 1; r is 0 or 1; R^(a) is H or OH; R^(b) andR^(c) are each independently H or C₁₋₃alkyl; R^(d) is H or a C₁₋₃alkylgroup unsubstituted or substituted with OH or NH₂; R^(e) and R^(f) areeach methyl, or R^(e) and R^(f) are taken together form a methylene orethylene bridge; and R⁵ is H or NH₂; provided that when R¹ is H and R²is H, methyl, or tert-butyl, then —N(R³)R⁴ is not 3-aminopyrrolidine,3-aminopiperidine, piperazine, or N-methylpiperazine.
 13. A method as inclaim 12, wherein the histamine H₄ receptor is in a subject with adisease, disorder, or medical condition mediated by histamine H₄receptor activity.
 14. A method as in claim 13, wherein the disease,disorder, or medical condition is inflammation.
 15. A method as in claim13, wherein the disease, disorder, or medical condition is selected fromthe group consisting of: inflammatory disorders, allergic disorders,dermatological disorders, autoimmune disease, lymphatic disorders, andimmunodeficiency disorders.
 16. A method as in claim 13, wherein thedisease, disorder, or medical condition is selected from: allergy,asthma, dry eye, chronic obstructed pulmonary disease (COPD),atherosclerosis, rheumatoid arthritis, multiple sclerosis, inflammatorybowel diseases, colitis, Crohn's disease, ulcerative colitis, psoriasis,pruritis, itchy skin, atopic dermatitis, urticaria, hives, ocularinflammation, conjunctivitis, dry eye, nasal polyps, allergic rhinitis,nasal itch, scleroderma, autoimmune thyroid diseases, immune-mediateddiabetes mellitus, lupus, Myasthenia gravis, autoimmune neuropathies,Guillain-Barré, autoimmune uveitis, autoimmune hemolytic anemia,pernicious anemia, autoimmune thrombocytopenia, temporal arteritis,anti-phospholipid syndrome, vasculitides, Wegener's granulomatosis,Behcet's disease, dermatitis herpetiformis, pemphigus vulgaris,vitiligio, primary biliary cirrhosis, autoimmune hepatitis, autoimmuneoophoritis, autoimmune orchitis, autoimmune disease of the adrenalgland, polymyositis, dermatomyositis, spondyloarthropathies, ankylosingspondylitis, and Sjogren's syndrome.
 17. A method as in claim 13,wherein the disease, disorder, or medical condition is selected from thegroup consisting of: allergy, asthma, autoimmune diseases, and pruritis.18. A method as in claim 13, wherein said at least one chemical entityis selected from the group consisting of:4-(4-Methyl-piperazin-1-yl)thieno[3,2-d]pyrimidin-2-ylamine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-[(3aR,6aR)-Hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-2-ylamine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-2-ylamine;4-[(3aR,6aR)-Hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidine;7-Methyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]thieno[3,2-d]pyrimidin-2-amine;7-Methyl-4-(4-methylpiperazin-1-yl)thieno[3,2-d]pyrimidin-2-amine;7-Bromo-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]thieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-(4-methylpiperazin-1-yl)thieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]thieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-piperazin-1-ylthieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6-tert-butylthieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-(octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl)thieno[3,2-d]pyrimidin-2-amine;4-[(4aR,7aR)-Octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N⁴-(2-Aminoethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N-(6,7,8,9-Tetrahydro[1]benzofuro[3,2-d]pyrimidin-4-yl)ethane-1,2-diamine;(3R)-N-Methyl-1-(6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-4-yl)pyrrolidin-3-amine;N-(6,7,8,9-Tetrahydro[1]benzothieno[3,2-d]pyrimidin-4-yl)ethane-1,2-diamine;(3R)-N-Methyl-1-(6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-4-yl)pyrrolidin-3-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(4aR,7aR)-Octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-Hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopiperidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(1S,4S)-2,5-Diazabicyclo[2.2.1]hept-2-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(1R,4R)-2,5-Diazabicyclo[2.2.1]hept-2-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;(3S,4S)-1-(2-Amino-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-4-yl)-4-(methylamino)pyrrolidin-3-ol;4-[(3R)-3-(Dimethylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Ethylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Aminomethyl)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(4aR,7aR)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(4-Methylpiperazin-1-yl)-7,8,9,10-tetrahydro-6H-cyclohepta[4,5]thieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-7,8,9,10-tetrahydro-6H-cyclohepta[4,5]thieno[3,2-d]pyrimidin-2-amine;4-[(4aR,7aR)-Octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-7,8,9,10-tetrahydro-6H-cyclohepta[4,5]thieno[3,2-d]pyrimidin-2-amine;4-[4-(2-Aminoethyl)piperazin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[4-(1-Methylethyl)piperazin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(4-Ethylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(Hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(Octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(5,6-Dihydro[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-(Methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diaza-bicyclo[3.2.1]oct-3-yl)-8-methoxy-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;8-tert-Butyl-4-(4-methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-[1,4]Diazepan-1-yl-8-trifluoromethyl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-(3(S)-Amino-pyrrolidin-1-yl)-8-tert-butyl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-(3,8-diazabicyclo[3.2.1]oct-3-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methoxy-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-8-tert-butyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-piperazin-1-yl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(4-Methylpiperazin-1-yl)-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methoxy-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3aR,6aS)-5-Methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methoxy-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3aR,6aS)-5-Methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-N4,6,6-trimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4,6,6-trimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-methoxy-N4-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-methoxy-N4-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-tert-butyl-N4-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-tert-butyl-N4-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4-methyl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4-methyl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4,8-dimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4,8-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;8,8-Difluoro-4-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-8,8-difluoro-N4-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;8,8-Difluoro-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-((R,R)-octahydropyrrolo[3,4-b]pyridin-6-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-8,8-difluoro-N4-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;8,8-Difluoro-4-[(3aR,6aS)-hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8,8-Dimethyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8,8-dimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-N4,8,8-trimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;8,8-Dimethyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Dimethyl-4-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8,8-dimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Dimethyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(4-Methylpiperazin-1-yl)-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-tert-butyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-piperazin-1-yl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methoxy-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;and pharmaceutically acceptable salts, prodrugs, and active metabolitesthereof.
 19. A method of treating a subject suffering from or diagnosedwith a disease, disorder, or medical condition mediated by histamine H₄receptor activity, comprising administering to the subject in need ofsuch treatment an effective amount of at least one chemical entityselected from compounds of Formula (I), pharmaceutically acceptablesalts of compounds of Formula (I), pharmaceutically acceptable prodrugsof compounds of Formula (I), and pharmaceutically active metabolites ofcompounds of Formula (I),

wherein X is O or S; R¹ is H, methyl, or bromo; R² is H or C₁₋₄alkyl; orR¹ and R² taken together form —(CH₂)₄₋₅— optionally substituted with oneor two substituents independently selected from C₁₋₄alkyl, C₁₋₄alkoxy,CF₃, and fluoro; —N(R³)R⁴ is one of the following moieties, wherein R³and R⁴ are taken together or separately as defined by each one of saidmoieties:

where q is 0 or 1; p is 0 or 1; r is 0 or 1; R^(a) is H or OH; R^(b) andR^(c) are each independently H or C₁₋₃alkyl; R^(d) is H or a C₁₋₃alkylgroup unsubstituted or substituted with OH or NH₂; R^(e) and R^(f) areeach methyl, or R^(e) and R^(f) taken together form a methylene orethylene bridge; and R⁵ is H or NH₂; provided that when R¹ is H and R²is H, methyl, or tert-butyl, then —N(R³)R⁴ is not 3-aminopyrrolidine,3-aminopiperidine, piperazine, or N-methylpiperazine.
 20. A method as inclaim 19, wherein the disease, disorder, or medical condition isinflammation.
 21. A method as in claim 19, wherein the disease,disorder, or medical condition is selected from the group consisting of:inflammatory disorders, allergic disorders, dermatological disorders,autoimmune disease, lymphatic disorders, and immunodeficiency disorders.22. A method as in claim 19, wherein the disease, disorder, or medicalcondition is selected from: allergy, asthma, dry eye, chronic obstructedpulmonary disease (COPD), atherosclerosis, rheumatoid arthritis,multiple sclerosis, inflammatory bowel diseases, colitis, Crohn'sdisease, ulcerative colitis, psoriasis, pruritis, itchy skin, atopicdermatitis, urticaria, hives, ocular inflammation, conjunctivitis, dryeye, nasal polyps, allergic rhinitis, nasal itch, scleroderma,autoimmune thyroid diseases, immune-mediated diabetes mellitus, lupus,Myasthenia gravis, autoimmune neuropathies, Guillain-Barré, autoimmuneuveitis, autoimmune hemolytic anemia, pernicious anemia, autoimmunethrombocytopenia, temporal arteritis, anti-phospholipid syndrome,vasculitides, Wegener's granulomatosis, Behcet's disease, dermatitisherpetiformis, pemphigus vulgaris, vitiligio, primary biliary cirrhosis,autoimmune hepatitis, autoimmune oophoritis, autoimmune orchitis,autoimmune disease of the adrenal gland, polymyositis, dermatomyositis,spondyloarthropathies, ankylosing spondylitis, and Sjogren's syndrome.23. A method as in claim 19, wherein the disease, disorder, or medicalcondition is selected from the group consisting of: allergy, asthma,autoimmune diseases, and pruritis.
 24. A method as in claim 19, whereinsaid at least one chemical entity is selected from the group consistingof: 4-(4-Methyl-piperazin-1-yl)thieno[3,2-d]pyrimidin-2-ylamine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-[(3aR,6aR)-Hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-2-ylamine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidin-2-ylamine;4-[(3aR,6aR)-Hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]furo[3,2-d]pyrimidine;4-(4-Methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidine;4-piperazin-1-yl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidine;7-Methyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]thieno[3,2-d]pyrimidin-2-amine;7-Methyl-4-(4-methylpiperazin-1-yl)thieno[3,2-d]pyrimidin-2-amine;7-Bromo-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]thieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-(4-methylpiperazin-1-yl)thieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]thieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-piperazin-1-ylthieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6-tert-butylthieno[3,2-d]pyrimidin-2-amine;6-tert-Butyl-4-(octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl)thieno[3,2-d]pyrimidin-2-amine;4-[(4aR,7aR)-Octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N⁴-(2-Aminoethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N-(6,7,8,9-Tetrahydro[1]benzofuro[3,2-d]pyrimidin-4-yl)ethane-1,2-diamine;(3R)-N-Methyl-1-(6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-4-yl)pyrrolidin-3-amine;N-(6,7,8,9-Tetrahydro[1]benzothieno[3,2-d]pyrimidin-4-yl)ethane-1,2-diamine;(3R)-N-Methyl-1-(6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-4-yl)pyrrolidin-3-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(4aR,7aR)-Octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-Hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopiperidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(1S,4S)-2,5-Diazabicyclo[2.2.1]hept-2-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(1R,4R)-2,5-Diazabicyclo[2.2.1]hept-2-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;(3S,4S)-1-(2-Amino-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-4-yl)-4-(methylamino)pyrrolidin-3-ol;4-[(3R)-3-(Dimethylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Ethylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Aminomethyl)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(4aR,7aR)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(4-Methylpiperazin-1-yl)-7,8,9,10-tetrahydro-6H-cyclohepta[4,5]thieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-7,8,9,10-tetrahydro-6H-cyclohepta[4,5]thieno[3,2-d]pyrimidin-2-amine;4-[(4aR,7aR)-Octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-7,8,9,10-tetrahydro-6H-cyclohepta[4,5]thieno[3,2-d]pyrimidin-2-amine;4-[4-(2-Aminoethyl)piperazin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[4-(1-Methylethyl)piperazin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(4-Ethylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(Hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(Octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(5,6-Dihydro[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-(Methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diaza-bicyclo[3.2.1]oct-3-yl)-8-methoxy-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;8-tert-Butyl-4-(4-methyl-piperazin-1-yl)-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-[1,4]Diazepan-1-yl-8-trifluoromethyl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-(3(S)-Amino-pyrrolidin-1-yl)-8-tert-butyl-6,7,8,9-tetrahydro-benzo[4,5]thieno[3,2-d]pyrimidin-2-ylamine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-(3,8-diazabicyclo[3.2.1]oct-3-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methoxy-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-8-tert-butyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-piperazin-1-yl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(4-Methylpiperazin-1-yl)-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methoxy-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-8-methoxy-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3aR,6aS)-5-Methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methoxy-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3aR,6aS)-5-Methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;6,6-Dimethyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-N4,6,6-trimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4,6,6-trimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-methoxy-N4-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-methoxy-N4-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-tert-butyl-N4-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-8-tert-butyl-N4-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4-methyl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4-methyl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4,8-dimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;N4-(2-Aminoethyl)-N4,8-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;8,8-Difluoro-4-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-8,8-difluoro-N4-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;8,8-Difluoro-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8,8-Difluoro-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-((R,R)-octahydropyrrolo[3,4-b]pyridin-6-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-8,8-difluoro-N4-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidine-2,4-diamine;4-[(3S)-3-Aminopyrrolidin-1-yl]-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(3-Aminoazetidin-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;8,8-Difluoro-4-[(3aR,6aS)-hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8,8-difluoro-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8,8-Dimethyl-4-(4-methylpiperazin-1-yl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8,8-dimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;N4-(2-Aminoethyl)-N4,8,8-trimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidine-2,4-diamine;8,8-Dimethyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Dimethyl-4-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8,8-dimethyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8,8-Dimethyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(4-Methylpiperazin-1-yl)-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-tert-butyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-[(3R)-3-(Methylamino)pyrrolidin-1-yl]-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-tert-Butyl-4-[(3R)-3-(methylamino)pyrrolidin-1-yl]-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[3-(Aminomethyl)azetidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-[(3R)-3-Aminopyrrolidin-1-yl]-8-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;8-Methyl-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-piperazin-1-yl-8-(trifluoromethyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(1,4-Diazepan-1-yl)-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;8-Methoxy-4-piperazin-1-yl-6,7,8,9-tetrahydro[1]benzothieno[3,2-d]pyrimidin-2-amine;4-(3,8-Diazabicyclo[3.2.1]oct-3-yl)-6,6-dimethyl-6,7,8,9-tetrahydro[1]benzofuro[3,2-d]pyrimidin-2-amine;and pharmaceutically acceptable salts, prodrugs, and active metabolitesthereof.